3 years ago

5x−3−7x = 15−x What is x?

2 answers:

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:

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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