Question:

. What number makes each equation true?

1. - 36 + n = 0

2. n - (-28) = 0

3.-18-n=0

1) 36 makes the equation true2) - 28 makes the equation true3) 18 makes the equation trueSolution:

When we add or subtract or multiply or divide by same number on both sides of equation, the equation still remains true

1) - 36 + n = 0

Add 36 to both sides

-36 + n + 36 = 0 + 36

n = 36

Thus 36 makes the equation true

2) n - (-28) = 0

n + 28 = 0

Subtract 28 from both sides

n + 28 - 28 = 0 - 28

n = - 28

Thus - 28 makes the equation true

3) - 18 - n = 0

Add 18 on both sides

-18 - n + 18 = 0 + 18

-n = 18

n = - 18

Thus 18 makes the equation true