Precalculus Examples

$4 x + 7 y = 28$ , $4 x + 7 y = - 28$

Step 1

Eliminate the equal sides of each equation and combine.

$28 = - 28$

Step 2

Since $28 \neq - 28$ , there are no solutions.

No solution

Step 3

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$