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2x + 3x + 9 =4
5x = 4-9
5x=-5
x=-1
2. y = 10-5x
4x-2(10-5x) = -6
4x-20+10x =-6
14x-20 =-6
14x=-6+20
14x=14
x=1
3. x=2+2y
3y-5(2+2y) =-24
3y -10-10y=-24
-7y=-24+10
y=-14/-7
y=2
4.y=5-2x
3x-2(5-2x)=11
3x-10+4=11
7x=21
x=3
5.y=13-4x
3x-2(13-4x)=7
3x-26+8x=7
11x=33
x=3