Question

Someone how do you do this problem

2x+4y=30

Answer 1

I am not sure exactly what you need, but here is what I got :))

(we have two variables so we cannot have an exact answer)

Solve for x:

(given) 2x + 4y = 30

(subtract 4y from both sides) 2x = -4y + 30

(divide both sides by 2) x = -2y + 15

Solve for y:

(given) 2x + 4y = 30

(subtract 2x from both sides) 4y = -2x + 30

(divide both sides by 4) y = -$\frac{1}{2}$x + 7 $\frac{1}{2}$

Y = mx + b form:

(same as above)

y = -$\frac{1}{2}$x + 7 $\frac{1}{2}$

Answer 2

Answer:

Solution: y = -1/2x + 7.5

Step-by-step explanation:

1) Subtract the 2x from both sides, effectively canceling it out on the left (original position), and creating a -2x on the right. The equation should now be 4y = -2x + 30

2) Divide every number in this new equation by 4. This should result in the 4y becoming just y, the -2x becoming -1/2x, and the 30 becoming 7.5

3) Rewrite the equation. Now the equation is y = -1/2x + 7.5.

Your answer is y = -1/2x + 7.5.