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Jokerboy101
your answer is 7.4x-42. hope this helps
Multiply everything in the parenthesis by 8.4.

8.4x - 42 - 2x + x

Combine like terms.

7.4x - 42 = 0

Add 42 to both sides.

7.4x = 42

Divide 7.4 on both sides.

x = 5.67

This can be rounded to 5.7.

Hope this helps!