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3 years ago

511 = -7 (10x – 13) steps

Mathematics

2 answers:

densk [106]3 years ago

7 0

Answer:

$511 = - 7(10x - 13) \\ 511 = - 70x + 91 \\ 511 - 91 = - 70x \\ 420 = - 70x \\ \frac{420}{ - 70} = \frac{ - 70x}{ - 70} \\ \\ x = - 6$

hope this helps you...

PilotLPTM [1.2K]3 years ago

3 0

Answer: $x=-6$

Simplify both sides of the equation

$511=(-7)(10x)+(-7)(-13)(Distribute)\\511=-70x+91$

Flip the equation

$-70x+91=511$

Subtract 91 from both sides

$-70x+91-91=511-91\\-70x=420$

Divide both sides by -70

$-70x/70=420/-70\\x=-6$

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