10x+21(x-4)=257

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Solution for 10x+21(x-4)=257 equation:


Simplifying
10x + 21(x + -4) = 257

Reorder the terms:
10x + 21(-4 + x) = 257
10x + (-4 * 21 + x * 21) = 257
10x + (-84 + 21x) = 257

Reorder the terms:
-84 + 10x + 21x = 257

Combine like terms: 10x + 21x = 31x
-84 + 31x = 257

Solving
-84 + 31x = 257

Solving for variable 'x'.

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

Add '84' to each side of the equation.
-84 + 84 + 31x = 257 + 84

Combine like terms: -84 + 84 = 0
0 + 31x = 257 + 84
31x = 257 + 84

Combine like terms: 257 + 84 = 341
31x = 341

Divide each side by '31'.
x = 11

Simplifying
x = 11

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