Question

1) 2×+×=9-×
2) 2-7+3Y-Y=15
3) 4+Y=5Y+12
4) z+3=2Z-1
5) 5Y+4=2Y-1
6) 2×+5=3×-1

Porfavor me ajudem é$\\ \\ \\ 2$ para amanhã

Answer 1

1) 2×+×=9-×
2x + x +x =9
4x = 9
x =9/4

2) 2-7+3Y-Y=15
3y-y=15-2+7
2y=20
y=20/2
y=10

3) 4+Y=5Y+12
y-5y=12-4
-4y=8
y=-8/4
y=-2

4) z+3=2Z-1
z-2z=-1-3
-z=-4
z=4

5) 5Y+4=2Y-1
5y-2y=-1-4
3y=-5
y=-5/3

6) 2×+5=3×-1
2x-3x=-1-5
-x=-6
x=6