News
Get Premium
Dashboard

Dashboard Sign out
Big Ideas Math: Modeling Real Life, Grade 7
BI
Big Ideas Math: Modeling Real Life, Grade 7 View details
1. Solving Equations Using Addition or Subtraction
Continue to next subchapter
search

Exercise 23 Page 131

Use the Subtraction Property of Equality to eliminate the addition.

y=- 2.08

Practice makes perfect
To solve the equation, we have to isolate y on one side. Using the Subtraction Property of Equality, we will subtract 4.58 from both sides of the equation. This will eliminate the addition and isolate y.
4.58 + y = 2.5
SubEqn

LHS-4.58=RHS-4.58

4.58 + y - 4.58 = 2.5 - 4.58
CommutativePropAdd

Commutative Property of Addition

y + 4.58 - 4.58 = 2.5 - 4.58
SubTerm

Subtract term

y = - 2.08
To check that this solution is correct, let's substitute y=- 2.08 into the original equation and simplify.
4.58 + y = 2.5
Substitute

y= - 2.08

4.58 +( - 2.08) ? = 2.5
AddNeg

a+(- b)=a-b

4.58 - 2.08 ? = 2.5
SubTerm

Subtract term

10.4 = 10.4 âś“
Since the left-hand side and right-hand side are equal, y=- 2.08 is the correct solution.
Subchapter links expand_more
arrow_right Try It p.128-129
1
Try It 2 (Page 128)
Try It 3 (Page 128)
4
arrow_right Self-Assessment for Concept & Skills p.129
Self-Assessment for Concept & Skills 5 (Page 129)
Self-Assessment for Concept & Skills 6 (Page 129)
Self-Assessment for Concept & Skills 7 (Page 129)
8
9
arrow_right Self-Assessment for Problem Solving p.130
10
11
arrow_right Review & Refresh p.131
Review & Refresh 1 (Page 131)
Review & Refresh 2 (Page 131)
Review & Refresh 3 (Page 131)
Review & Refresh 4 (Page 131)
Review & Refresh 5 (Page 131)
Review & Refresh 6 (Page 131)
Review & Refresh 7 (Page 131)
Review & Refresh 8 (Page 131)
9
arrow_right Concept, Skills, & Problem Solving p.131-132
10
Concept, Skills, & Problem Solving 11 (Page 131)
Concept, Skills, & Problem Solving 12 (Page 131)
Concept, Skills, & Problem Solving 13 (Page 131)
Concept, Skills, & Problem Solving 14 (Page 131)
Concept, Skills, & Problem Solving 15 (Page 131)
Concept, Skills, & Problem Solving 16 (Page 131)
Concept, Skills, & Problem Solving 17 (Page 131)
Concept, Skills, & Problem Solving 18 (Page 131)
Concept, Skills, & Problem Solving 19 (Page 131)
Concept, Skills, & Problem Solving 20 (Page 131)
Concept, Skills, & Problem Solving 21 (Page 131)
Concept, Skills, & Problem Solving 22 (Page 131)
Concept, Skills, & Problem Solving 23 (Page 131)
Concept, Skills, & Problem Solving 24 (Page 131)
Concept, Skills, & Problem Solving 25 (Page 131)
Concept, Skills, & Problem Solving 26 (Page 131)
Concept, Skills, & Problem Solving 27 (Page 131)
28
Concept, Skills, & Problem Solving 29 (Page 131)
Concept, Skills, & Problem Solving 30 (Page 131)
Concept, Skills, & Problem Solving 31 (Page 131)
Concept, Skills, & Problem Solving 32 (Page 131)
33
34
35
36
37
38
39
40
41
42
43
44
Concept, Skills, & Problem Solving 45 (Page 132)
Concept, Skills, & Problem Solving 46 (Page 132)
Concept, Skills, & Problem Solving 47 (Page 132)