3(5)+7x=21

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Solution for 3(5)+7x=21 equation: 


Simplifying
3(5) + 7x = 21

Multiply 3 * 5
15 + 7x = 21

Solving
15 + 7x = 21

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + 7x = 21 + -15

Combine like terms: 15 + -15 = 0
0 + 7x = 21 + -15
7x = 21 + -15

Combine like terms: 21 + -15 = 6
7x = 6

Divide each side by '7'.
x = 0.8571428571

Simplifying
x = 0.8571428571

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