3(j+7)+4(j-4)=-30

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Solution for 3(j+7)+4(j-4)=-30 equation:


Simplifying
3(j + 7) + 4(j + -4) = -30

Reorder the terms:
3(7 + j) + 4(j + -4) = -30
(7 * 3 + j * 3) + 4(j + -4) = -30
(21 + 3j) + 4(j + -4) = -30

Reorder the terms:
21 + 3j + 4(-4 + j) = -30
21 + 3j + (-4 * 4 + j * 4) = -30
21 + 3j + (-16 + 4j) = -30

Reorder the terms:
21 + -16 + 3j + 4j = -30

Combine like terms: 21 + -16 = 5
5 + 3j + 4j = -30

Combine like terms: 3j + 4j = 7j
5 + 7j = -30

Solving
5 + 7j = -30

Solving for variable 'j'.

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

Add '-5' to each side of the equation.
5 + -5 + 7j = -30 + -5

Combine like terms: 5 + -5 = 0
0 + 7j = -30 + -5
7j = -30 + -5

Combine like terms: -30 + -5 = -35
7j = -35

Divide each side by '7'.
j = -5

Simplifying
j = -5

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