Question

3х – 4 y = 7; 5х + 2y = 3.​

Answer 1

Explanation:

given equations 1 & 2

multiply equation 1 with 2

and equation 2 with 4

we get

$6x - 8y = 14 \\ 20x + 8y = 12$

by solving above equation

we get

$26x = 26 \\ x = 26 \div 26 \\ x = 1$

substitute x value in equation 1

$3 \times 1 - 4y = 7 \\ - 4y = 7 - 3 \\ - 4y = 4 \\ y = 4 \div - 4 \\ y = - 1$