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Find the value of [tex]$x$[/tex] in the equation [tex]$9 - 4x = 57$[/tex].

A. 16.5
B. -16.5
C. 12
D. -12


Sagot :

To solve the equation [tex]\(9 - 4x = 57\)[/tex] step by step, we need to isolate the variable [tex]\(x\)[/tex]. Here's the process:

1. Move the constant term from the left side to the right side:

Subtract 9 from both sides of the equation:
[tex]\[ 9 - 4x - 9 = 57 - 9 \][/tex]
Simplifying this, we get:
[tex]\[ -4x = 48 \][/tex]

2. Solve for [tex]\(x\)[/tex] by dividing both sides by -4:
[tex]\[ x = \frac{48}{-4} \][/tex]
Simplifying this, we obtain:
[tex]\[ x = -12 \][/tex]

Therefore, the value of [tex]\(x\)[/tex] is [tex]\(-12\)[/tex]. Thus, the correct answer is [tex]\( \boxed{-12} \)[/tex].