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Mathematics
Cailyn Cohen
7 November, 18:14
3x+7=5x-21 Find the value of x
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Kianna
7 November, 20:10
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Since 5x contains the variable to solve for move it to the left-hand side of the equation by subtracting 5x from both sides.
3x+7-5x=-21
Add 3x and - 5x to get - 2x.
-2x+7=-21
Since 7 does not have the variable to solve for, move it to the right hand side of the equation by subtracting 7 from both sides.
-2x=-7-21
Subtract 21 from - 7 to get - 28.
-2x=-28
Divide each term in the equation by - 2.
x=14
Answer:
x=14
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Dereon Buckley
7 November, 22:01
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So try to get the x term to one side by itself
add 21 to both siede
3x+28=5x
subtract 3 x from both sides
28=2x
divide 2
14=x
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