Allison works in a department store selling clothing. She makes a guaranteed salary of $350 per week, but is paid a commision on
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m(x) = 4x + 15
Find the value of "x" that would satisfy m(x) = 7:
4x + 15 = 7
Subtract 15 from both sides:
4x = -8
Divide both sides by 4:
x = -2.