This is an equation, you can't write equations as decimals. I think you're asking for x (as a decimal)?
Add 8 to each side: 4+8= 8+(-8)+3x
12=3x
x=4
This is a whole number so it's already in decimal form
Step-by-step explanation:
We just subsitue 3 for x and -4 for y, so we get

So




Answer:
7
Step-by-step explanation:
Multiply the first collum by 7. It's basically unit rates