Prove that if -5(x + 4) = 70, the x = -18. Write a justification for each step.
2 answers:
Answer:
x=-18
Step-by-step explanation:
-5(x+4)=70
x+4=-14
x=-14-4
x=-18
Step-by-step explanation:
Let's solve your equation step-by-step.
−5(x+4)=70
Step 1: Simplify both sides of the equation.
−5(x+4)=70
(−5)(x)+(−5)(4)=70(Distribute)
−5x+−20=70
−5x−20=70
Step 2: Add 20 to both sides.
−5x−20+20=70+20
−5x=90
Step 3: Divide both sides by -5.
−5x
−5
=
90
−5
x=−18
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