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Mademuasel [1]
3 years ago
10

If 3x+9=(10+x) then what does x equal?

Mathematics
2 answers:
serious [3.7K]3 years ago
7 0
Remember you can do anything to an equation as long as you do it to both sides

3x+9=10+x
minus x both sides
3x-x+9=10+x-x
2x+9=10+0
2x+9=10
minus 9 both sides
2x+9-9=10-9
2x+0=1
2x=1
divide both sides by 2
x=1/2
neonofarm [45]3 years ago
3 0
3x + 9 = 10 + x
2x +9 = 10
2x = 1
x = 1/2
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use the elimination method to solve the system of equations choose the correct ordered pair 7x+4y=39 2y+4y=14
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x = 5 \: and \: y = 1.

Step-by-step explanation:

7x + 4y = 39 \:  -  {eq}^{n} (1)

2x + 4y = 14  \: \:  -  {eq}^{n} (2)

Multiply Equation no (1) with 2 and Equation no (2) with 7.

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( - ) \: \:  \:  ( - ) \:  \:  \: ( - )

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Solve the equation. −3(y+5)=15
e-lub [12.9K]

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