Question

8x-5y=33 -2x-4y=-44 .

Answer 1

8x - 5y = 33 ×(4)...... 32x -20y = 132
-2x - 4y = -44 x(-5)... 10x +20y = 220
Sumo 42x + 0 = 352
x = 352/42 = 8,38 = x
-2x -4y = -44
-2(8,38) - 4y = -44
-16,76 -4y = -44
y = (-44 + 16,8)/-4 = -27,2/-4 = 6,81 = y
Verifico: -2x- 4y =-44
-2(8,38) - 4 (6,81) = -44
-16,76 - 27,24 = -44
-44 = -44 verifica