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Mathematics
Rory Archer
16 August, 08:36
What's the answer to:
X + 9 = 18 - 2x?
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Gillian Rocha
16 August, 11:20
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Remember you can do anything to an equation as long as you do it to both sides
x+9=18-2x
add 2x to both sides
2x+x+9=18+2x-2x
3x+9=18+0
3x+9=18
minus 9 both sides
3x+9-9=18-9
3x+0=9
3x=9
divide both sides by 3
(3x) / 3=9/3
(3/3) x=3
1x=3
x=3
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