Question
Fill in the blank with integer:
-3 × (-11 + _______) = 45
-3 × (-11 + _______) = 45
✓
Answer
Let unknown be y.
-3 × (-11 + y) = 45
⇒ (-11 + 7) = 45 ÷ (-3)
⇒ -11 + y = -15
⇒ y = -15 + 11
⇒ y = -4
∴ -3 × (-11 + (-4)) = 45
-3 × (-11 + y) = 45
⇒ (-11 + 7) = 45 ÷ (-3)
⇒ -11 + y = -15
⇒ y = -15 + 11
⇒ y = -4
∴ -3 × (-11 + (-4)) = 45
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