Exercise 21 Page 85

To solve the equation, we have to isolate g on one of the sides. By adding 3.5 to both sides, we are using the Addition Property of Equality to isolate g.

g-3.5=10

AddEqn

LHS+3.5=RHS+3.5

g-3.5+ 3.5=10+ 3.5

AddSubTerms

Add and subtract terms

g=13.5

We found that g=13.5 is the solution to the equation. To check that we have the correct solution, we can substitute g=13.5 into the original equation and simplify.

g-3.5=10

Substitute

g= 13.5

13.5-3.5? =10

SubTerm

Subtract term

10=10 ✓

Since the left-hand side and right-hand side are equal, g=13.5 is the correct solution.