5x−3−7x = 15−x What is x?

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01-07-2020
Mathematics

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5x−3−7x = 15−x What is x?

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diuehduie diuehduie · Answer 1 · 2020-07-01T07:28:16+02:00

diuehduie diuehduie

01-07-2020

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

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ZJSG09112007 ZJSG09112007 · Answer 2 · 2020-07-01T09:27:02+02:00

ZJSG09112007 ZJSG09112007

01-07-2020

Answer:

x = -18

Step-by-step explanation:

[tex]5x - 3 - 7x = 15 - x \\ collect \: like \: terms \: \\ 5x - 7x + x = 15 + 3 \\ - x = 18[/tex]

[tex] \frac{ - x}{ - 1} = \frac{18}{ - 1} \\ x = - 18[/tex]

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