Solve for x
x<-15
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5x+15<4x
Multiply both sides of the equation by 5. Since 5 is positive, the inequality direction remains the same.
5x+15-4x<0
Subtract 4x from both sides.
x+15<0
Combine 5x and -4x to get x.
x<-15
Subtract 15 from both sides. Anything subtracted from zero gives its negation.
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