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Jabari Cantrell
Mathematics
19 May, 01:01
Solve for X: 39 - 7x = - 4 (7x + 7) = 4
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Brooks Hahn
19 May, 01:10
0
Simplifying
39 + - 7x = - 4 (7x + 7) + 4
Reorder terms
39 + - 7x = - 4 (7 + 7x) + 4
39 + - 7x = (7 * - 4 + 7x * - 4) + 4
39 + - 7x = (-28 + - 28x) + 4
Reorder the terms
39 + - 7x = - 28 + 4 + - 28x
Combine like terms - 28 + 4 = - 24
39 + - 7x = - 24 + - 28x
Solving
39 + - 7x = - 24 + - 28x
Solve for variable x all terms x left, all others right.
Add '28x' to each side of the equation.
39 + - 7x + 28x = - 24 + - 28x + 28x
Combine like terms - 7x + 28x = 21x
39 + 21x = - 24 + - 28x + 28x
Combine like terms - 28x + 28x = 0
39 + 21x = - 24 + 0
39 + 21x = - 24
Add '-39' to each side of the equation.
39 + - 39 + 21x = - 24 + - 39
Combine like terms: 39 + - 39 = 0
0 + 21x = - 24 + - 39
21x = - 24 + - 39
Combine like terms - 24 + - 39 = - 63
21x = - 63
Divide each side by 21
x = - 3
Simplifying
x = - 3
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Catalina Oneill
19 May, 01:19
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Subtract 39 from both sides
-7x = - 4 - 39
Simplify - 4 - 39 to - 43
-7x = - 43
Divide both sides by - 7
x = - 43/-7
Two negative make a positive
x = 43/7
For the second equation;
Simplify brackets
7x + 7 = 4
Subtract 7 from both sides
7x = 4 - 7
Simplify 4 - 7 to - 3
7x = - 3
Divide both sides by 7
x = - 3/7
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