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Anastaziya [24]
3 years ago
8

5x−3−7x = 15−x What is x?

Mathematics
2 answers:
Schach [20]3 years ago
6 0
Simplify 5x-3-7 to -2x-3
-2x-3=15-x
Add 2x on both sides
−3=15−x+2x
Simplify 15-x+2x to 15+x
−3=15+x
Subtract 15 on both sides
-3-15=x
Simplify -3-15 to -18
-18=x
X=-18
Mamont248 [21]3 years ago
4 0

Answer:

<h2>x = -18</h2>

Step-by-step explanation:

5x - 3 - 7x = 15 - x  \\ collect \: like \: terms \:  \\ 5x - 7x + x = 15 + 3 \\  - x = 18

\frac{ - x}{ - 1}  =  \frac{18}{ - 1}  \\ x =  - 18

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