Solve for x
x<15
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1680+80x-64x<1920
Subtract 64x from both sides.
1680+16x<1920
Combine 80x and -64x to get 16x.
16x<1920-1680
Subtract 1680 from both sides.
16x<240
Subtract 1680 from 1920 to get 240.
x<\frac{240}{16}
Divide both sides by 16. Since 16 is positive, the inequality direction remains the same.
x<15
Divide 240 by 16 to get 15.
Examples
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Matrix
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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