Question

Item 3

Solve for a.

a+(−4)=−13




a=−17

a=−9

a = 9

a = 17

Answer 1

a = -9

Explanation:

a+(-4)=-13

add 4 to each side

a-4+4 = -13+4

a = -9

Answer 2

a = - 9

Explanation:

a + (-4) = -13

Add 4 to both sides

a + (-4) + 4 = -13 + 4

a + 0 = -9

a = -9

When two numbers have different sign, subtract and the result will have the sign of the bigger number