2x-8y – 5z = 7
8x + 9y + 5z = -6
6x- 10y - 5z = 5

Let's solve for x.

2x−8y−5z=7

Step 1: Add 8y to both sides.

2x−8y−5z+8y=7+8y

2x−5z=8y+7

Step 2: Add 5z to both sides.

2x−5z+5z=8y+7+5z

2x=8y+5z+7

Step 3: Divide both sides by 2.

2x/2=8y+5z+7/2

x=4y+5/2z+7/2

Let's solve for x.

8x+9y+5z=−6

Step 1: Add -9y to both sides.

8x+9y+5z+−9y=−6+−9y

8x+5z=−9y−6

Step 2: Add -5z to both sides.

8x+5z+−5z=−9y−6+−5z

8x=−9y−5z−6

Step 3: Divide both sides by 8.

8x/8=−9y−5z−6/8

x=−9/8y+−5/8z+−3/4

Let's solve for x.

6x−10y−5z=5

Step 1: Add 10y to both sides.

6x−10y−5z+10y=5+10y

6x−5z=10y+5

Step 2: Add 5z to both sides.

6x−5z+5z=10y+5+5z

6x=10y+5z+5

Step 3: Divide both sides by 6.

6x/6=10y+5z+5/6

x=5/3y+5/6z+5/6

Step-by-step explanation:

hopes this helps:-)

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are