3x+[4(x-1)]=45

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Solution for 3x+[4(x-1)]=45 equation:


Simplifying
3x + [4(x + -1)] = 45

Reorder the terms:
3x + [4(-1 + x)] = 45
3x + [(-1 * 4 + x * 4)] = 45
3x + [(-4 + 4x)] = 45
3x + [-4 + 4x] = 45

Remove brackets around [-4 + 4x]
3x + -4 + 4x = 45

Reorder the terms:
-4 + 3x + 4x = 45

Combine like terms: 3x + 4x = 7x
-4 + 7x = 45

Solving
-4 + 7x = 45

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 7x = 45 + 4

Combine like terms: -4 + 4 = 0
0 + 7x = 45 + 4
7x = 45 + 4

Combine like terms: 45 + 4 = 49
7x = 49

Divide each side by '7'.
x = 7

Simplifying
x = 7

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