Solve for x
x\leq 4
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Algebra
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- \frac { 2 } { 5 } x \leq \frac { 4 } { 5 } - \frac { 3 } { 5 } x
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-\frac{2}{5}x+\frac{3}{5}x\leq \frac{4}{5}
Add \frac{3}{5}x to both sides.
\frac{1}{5}x\leq \frac{4}{5}
Combine -\frac{2}{5}x and \frac{3}{5}x to get \frac{1}{5}x.
x\leq \frac{4}{5}\times 5
Multiply both sides by 5, the reciprocal of \frac{1}{5}. Since \frac{1}{5} is positive, the inequality direction remains the same.
x\leq 4
Cancel out 5 and 5.
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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