Answer:
hopes this helps!
Step-by-step explanation:
1) −y−9z=4−10x
2 Add 9z9z to both sides.
-y=4-10x+9z
−y=4−10x+9z
3 Multiply both sides by -1−1.
y=-4+10x-9z
y=−4+10x−9z
2)1 Add 4x4x to both sides.
y+4z=-1+4x
y+4z=−1+4x
2 Regroup terms.
y+4z=4x-1
y+4z=4x−1
3 Subtract 4z4z from both sides.
y=4x-1-4z
y=4x−1−4z
3)1 Add yy to both sides.
-x+z=6+y
−x+z=6+y
2 Regroup terms.
z-x=6+y
z−x=6+y
3 Subtract zz from both sides.
-x=6+y-z
−x=6+y−z
4 Multiply both sides by -1−1.
x=-6-y+z
x=−6−y+z
