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Sagot :
Answer:
C. 11
Step-by-step explanation:
(4x + 18) + (8x + 30) = 180
Combine like terms
12x + 48 = 180
Subtract 48 from both sides
12x = 132
Divide both sides by 12
x = 11
X = 11
Both equations given are supplementary, meaning that they add up to 180, so set them equal to 180 and solve.
(8x + 30) + (4x + 18) = 180
12x + 48 = 180
12x = 132
x = 11
Both equations given are supplementary, meaning that they add up to 180, so set them equal to 180 and solve.
(8x + 30) + (4x + 18) = 180
12x + 48 = 180
12x = 132
x = 11
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