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mario62 [17]
3 years ago
6

Distributive Property Find what is x.

Mathematics
2 answers:
andreev551 [17]3 years ago
8 0
A) -9

-7(x+9)=9(x-5)-14x
-7x-63=9x-45-14x
-45 -45
-7x-18=9x-14x
+7x +7x
-18=9x+7x-14x
-18=2x
(-18)/2=(2x)/2
-9=x
Iteru [2.4K]3 years ago
6 0
-7(x + 9) = 9(x - 5) - 14x → Given
-7x - 63 = 9x - 45 - 14x → Distributive Property
-7x - 63 = -5x - 45 → Combine like terms (9x and -14x)
-12x - 63 = -45 → Addition property of equality (-7x and -5x)
-12x = 18 → Addition property of equality (Add 63 to both sides)
x = -³/₂ or -1 ¹/₂ or -1.5

Hope it helps.
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Check your work!  Make sure these three consecutive numbers do in fact add up to -87.

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