What’s the answer too this problem i can’t solve?

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Find solution of the linear equation y = 2/3x + 1/3