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Quiz: Step 4
1-2: Lesson Quiz X
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D Question 1
1 pts
Suppose x = 7 is a solution to the equation 4x - 21x + a) = 8. Find the value of a that makes the equation
true.
03
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O2
0-25

Respuesta :

Answer:

substitute x into the equation..

4x - 21x + a) = 8

4*7-21*7+a = 8

4*7 = 28, 21*7 = 147

28-147+a = 8

28-147 = -119

-119+a = 8

add -119 to both sides

a=127, hope this is correct and it helps!

Step-by-step explanation:

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