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Mathematics
Cecelia Mcintyre
27 January, 05:00
Find x
9x+3+5x-2+11x-21=180
+3
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2
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John Cunningham
27 January, 07:13
0
Answer: x = 8
Step-by-step explanation:
Simplify: (9x+5x+11x) + (3-2-21) = 180
25x-20 = 180
25x = 200
x = 8
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Yareli Gibson
27 January, 08:06
0
x = 8
Step-by-step explanation:
Simplifying
(9x + 3) + (5x + - 2) + (11x + - 21) = 180
Reorder the terms:
(3 + 9x) + (5x + - 2) + (11x + - 21) = 180
Remove parenthesis around (3 + 9x)
3 + 9x + (5x + - 2) + (11x + - 21) = 180
Reorder the terms:
3 + 9x + (-2 + 5x) + (11x + - 21) = 180
Remove parenthesis around (-2 + 5x)
3 + 9x + - 2 + 5x + (11x + - 21) = 180
Reorder the terms:
3 + 9x + - 2 + 5x + (-21 + 11x) = 180
Remove parenthesis around (-21 + 11x)
3 + 9x + - 2 + 5x + - 21 + 11x = 180
Reorder the terms:
3 + - 2 + - 21 + 9x + 5x + 11x = 180
Combine like terms: 3 + - 2 = 1
1 + - 21 + 9x + 5x + 11x = 180
Combine like terms: 1 + - 21 = - 20
-20 + 9x + 5x + 11x = 180
Combine like terms: 9x + 5x = 14x
-20 + 14x + 11x = 180
Combine like terms: 14x + 11x = 25x
-20 + 25x = 180
Solving
-20 + 25x = 180
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '20' to each side of the equation.
-20 + 20 + 25x = 180 + 20
Combine like terms: - 20 + 20 = 0
0 + 25x = 180 + 20
25x = 180 + 20
Combine like terms: 180 + 20 = 200
25x = 200
Divide each side by '25'.
x = 8
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