Answer: x= 1/7y + z + 9/7
Explanation:
Let's solve for x.
y= 7x-7z-9
Step 1: Flip the equation.
7x-7z-9=y
Step 2: Add 7z to both sides.
7x-7z-9+7z=y+7z
7x-9=y+7z
Step 3: Add 9 to both sides.
7x-9+9=y +7z+9
7x=y+7z+9
Step 4: Divide both sides by 7
7x/7 = y+7z+9/7
x= 1/7y + z +9/7