Решите систему уравнений способом сложения
2) x/6 + y/4 = 6
x/8 - y/2 = -1
4) x/12 + y/5 = 8
x/4 - y/7 = -2

2x/6 + y/4 = 6⇒2x+3y=72 x/8 - y/2 = -1⇒x-4y=-8/*(-2)⇒-2x+8y=1611y=88y=82x+24=722x=48x=24(24;8)4x/12 + y/5 = 8⇒5x+12y=480 x/4 - y/7 = -2 ⇒7x-4y=-56/*3⇒21x-12y=-16826x=312x=1260+12y=48012y=420y=35(12;35)