7. What is the value of x?
A. 4 B. 6 C. 8 D. 10
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Answer:
D. 10
Step-by-step explanation:
[tex]5x - 10 = 2x + 20 \\ 5x - 2x = 20 + 10 \\ 3x = 30 \\ \frac{3x}{3} = \frac{30}{3} \\ x = 10[/tex]