4(j-4)-7(j+5)=-81

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Solution for 4(j-4)-7(j+5)=-81 equation:


Simplifying
4(j + -4) + -7(j + 5) = -81

Reorder the terms:
4(-4 + j) + -7(j + 5) = -81
(-4 * 4 + j * 4) + -7(j + 5) = -81
(-16 + 4j) + -7(j + 5) = -81

Reorder the terms:
-16 + 4j + -7(5 + j) = -81
-16 + 4j + (5 * -7 + j * -7) = -81
-16 + 4j + (-35 + -7j) = -81

Reorder the terms:
-16 + -35 + 4j + -7j = -81

Combine like terms: -16 + -35 = -51
-51 + 4j + -7j = -81

Combine like terms: 4j + -7j = -3j
-51 + -3j = -81

Solving
-51 + -3j = -81

Solving for variable 'j'.

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

Add '51' to each side of the equation.
-51 + 51 + -3j = -81 + 51

Combine like terms: -51 + 51 = 0
0 + -3j = -81 + 51
-3j = -81 + 51

Combine like terms: -81 + 51 = -30
-3j = -30

Divide each side by '-3'.
j = 10

Simplifying
j = 10

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