Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
1. Solving Equations Using Addition or Subtraction
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Exercise 1 Page 131

Write 20 as the product of 4 and 5.

4(x - 5)

Practice makes perfect
We want to factor out the coefficient of the variable term in the given expression. 4x - 20The coefficient is equal to 4. Let's split into factors 4x and 20. One of the factors should be equal to 4. 4x&= 4* x 20&= 4* 5 20 is divisible by 4, so we can factor out 4.
4x - 20
4* x - 4* 5
4(x - 5)