7(a+3)21=91

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Solution for 7(a+3)21=91 equation:


Simplifying
7(a + 3) * 21 = 91

Reorder the terms:
7(3 + a) * 21 = 91

Reorder the terms for easier multiplication:
7 * 21(3 + a) = 91

Multiply 7 * 21
147(3 + a) = 91
(3 * 147 + a * 147) = 91
(441 + 147a) = 91

Solving
441 + 147a = 91

Solving for variable 'a'.

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

Add '-441' to each side of the equation.
441 + -441 + 147a = 91 + -441

Combine like terms: 441 + -441 = 0
0 + 147a = 91 + -441
147a = 91 + -441

Combine like terms: 91 + -441 = -350
147a = -350

Divide each side by '147'.
a = -2.380952381

Simplifying
a = -2.380952381

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