42*2=3a-10a

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Solution for 42*2=3a-10a equation:


Simplifying
42 * 2 = 3a + -10a

Multiply 42 * 2
84 = 3a + -10a

Combine like terms: 3a + -10a = -7a
84 = -7a

Solving
84 = -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
84 + 7a = -7a + 7a

Combine like terms: -7a + 7a = 0
84 + 7a = 0

Add '-84' to each side of the equation.
84 + -84 + 7a = 0 + -84

Combine like terms: 84 + -84 = 0
0 + 7a = 0 + -84
7a = 0 + -84

Combine like terms: 0 + -84 = -84
7a = -84

Divide each side by '7'.
a = -12

Simplifying
a = -12

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