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b)
D) a) {x + 4 = y
{x+ y = 26
b) {a+b :2 = 24
{a+b=5:3
G)
a) 2x-4y=7 / * -1
2x+4y=-7
-2x+4y=-7
2x+4y=-7
8y = 0
b) 6x=4y-3
3x=3+2y / * -2
6x=4y-3
-6x=-4y-6
0=-9