### Home > CC2 > Chapter 1 > Lesson 1.2.7 > Problem1-126

1-126.

Find a value for $x$ that will make each of the following equations true. Homework Help ✎

What undoes each operation?

1. $x+8=21$

What plus 8 is 21? Or, what does 21 − 8 equal?

2. $x-32=55$

What minus 32 is 55? Or, what does 55 + 32 equal?

x = 87

3. $3x=54$

3 multiplied by what is 54? Or, what does 54 divided by 3 equal?

18

4. $\frac{x}{5}=10$

What divided by 5 is 10? Or, what does 10 multiplied by 5 equal?