Question

Să se rezolve: a) {2x-y=3
x+2y=5
b) { x+y=6
2x-3x=-8​

Answer 1

COROANA TE ROG!!!

a)

2x-y=3 => -y=3-2x => y=2x-3

x+2y=5 => x+2(2x-3)=5 => x+4x-6=5 => x=11/5

y=2*(11/5)-3=(22/5)-3=22/5-15/5=7/5

b)

x+y=6 => 8+y=6 => y=-2

2x-3x=-8 => -x=-8 => x=8