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2x+4y=-26
b) 3x + y = -5 / :3
x + ⅓y= -5/3 /*2
2x+ ⅔y= -10/3
c) - x + 4y = 2 /* -2
2x -8y = -4
d) x - ½y = 1 /*2
2x - y =2
e) 3x - 3y = 1 / :3
x-y = ⅓ / *2
2x-2y= ⅔
f) x + 3/4y = 0 / *2
2x + (3/2)y=0