[7(a+5)-18]-[2(a-3)+2]=

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Solution for [7(a+5)-18]-[2(a-3)+2]= equation:


Simplifying
[7(a + 5) + -18] + -1[2(a + -3) + 2] = 0

Reorder the terms:
[7(5 + a) + -18] + -1[2(a + -3) + 2] = 0
[(5 * 7 + a * 7) + -18] + -1[2(a + -3) + 2] = 0
[(35 + 7a) + -18] + -1[2(a + -3) + 2] = 0

Reorder the terms:
[35 + -18 + 7a] + -1[2(a + -3) + 2] = 0

Combine like terms: 35 + -18 = 17
[17 + 7a] + -1[2(a + -3) + 2] = 0

Remove brackets around [17 + 7a]
17 + 7a + -1[2(a + -3) + 2] = 0

Reorder the terms:
17 + 7a + -1[2(-3 + a) + 2] = 0
17 + 7a + -1[(-3 * 2 + a * 2) + 2] = 0
17 + 7a + -1[(-6 + 2a) + 2] = 0

Reorder the terms:
17 + 7a + -1[-6 + 2 + 2a] = 0

Combine like terms: -6 + 2 = -4
17 + 7a + -1[-4 + 2a] = 0
17 + 7a + [-4 * -1 + 2a * -1] = 0
17 + 7a + [4 + -2a] = 0

Reorder the terms:
17 + 4 + 7a + -2a = 0

Combine like terms: 17 + 4 = 21
21 + 7a + -2a = 0

Combine like terms: 7a + -2a = 5a
21 + 5a = 0

Solving
21 + 5a = 0

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + -21 + 5a = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 5a = 0 + -21
5a = 0 + -21

Combine like terms: 0 + -21 = -21
5a = -21

Divide each side by '5'.
a = -4.2

Simplifying
a = -4.2

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