40x+3(1.5x)=690

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Solution for 40x+3(1.5x)=690 equation: 


Simplifying
40x + 3(1.5x) = 690

Remove parenthesis around (1.5x)
40x + 3 * 1.5x = 690

Multiply 3 * 1.5
40x + 4.5x = 690

Combine like terms: 40x + 4.5x = 44.5x
44.5x = 690

Solving
44.5x = 690

Solving for variable 'x'.

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

Divide each side by '44.5'.
x = 15.50561798

Simplifying
x = 15.50561798

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