212=7+5(1+8x)

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Solution for 212=7+5(1+8x) equation:


Simplifying
212 = 7 + 5(1 + 8x)
212 = 7 + (1 * 5 + 8x * 5)
212 = 7 + (5 + 40x)

Combine like terms: 7 + 5 = 12
212 = 12 + 40x

Solving
212 = 12 + 40x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-40x' to each side of the equation.
212 + -40x = 12 + 40x + -40x

Combine like terms: 40x + -40x = 0
212 + -40x = 12 + 0
212 + -40x = 12

Add '-212' to each side of the equation.
212 + -212 + -40x = 12 + -212

Combine like terms: 212 + -212 = 0
0 + -40x = 12 + -212
-40x = 12 + -212

Combine like terms: 12 + -212 = -200
-40x = -200

Divide each side by '-40'.
x = 5

Simplifying
x = 5

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