Question

Fill in the blank to make the number sentence TRUE.

Answer 1

Answer:

1. 29

2. 24

3. 50

4. 69

Step-by-step explanation:

You can replace blank with x, and isolate x for each equation by moving the numbers on the same side of the x to the other side by subtracting them.

For example, for 1.

$43+x=53+19\\43-43+x=72-43 \\\\x=29$

subtract 43 by both sides to move it to right