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Big Ideas Math: Modeling Real Life, Grade 6
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Big Ideas Math: Modeling Real Life, Grade 6 View details
2. Solving Equations Using Addition or Subtraction
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Exercise 44 Page 257

We have been given a sentence and we need to translate it into an equation.

93 is the sum of a number g and 58.

Every equation has an equals sign and values or expressions on either side of it. Key phrases, such as is, is equal to, and equals tell us about the placement of the equals sign.

93 is the sum of a numberg and 58. ⇕ 93 = the sum of a numberg and 58. On the right-hand side we have a key phrase: the sum of. This word tell us the operations that will be used in our equation. The sum of indicates addition. The sum of a numberg and 58 g + 58 On the left-hand side, we only have a number 93. Putting these sides together, we have a complete equation. 93 = g + 58

Solving the Equation

Finally, we can solve the equation using the Properties of Equality.
93=g+58
SubEqn

LHS-58=RHS-58

93-58=g+58-58
SubTerm

Subtract term

35=g
RearrangeEqn

Rearrange equation

g=35
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