3steves
07.09.2021 •
Mathematics
Suppose x = 7 is a solution to the equation 4x − 2(x + a) = 8. Find the value of a that makes the equation true.Group of answer choices62-253
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Ответ:
x + 3y = -5
+ (12x-3y = 18)
13x = 13
So x = 1
Plug x = 1 into any of these, such as 1 + 3y = -5, which becomes 3y = -6, and then y = -2.
x = 1
y = -2