Solve the system for (x).
-4x + 2y = 2
-3x + y = 4

-4x + 2y=2 (equa...1)

-3x + y=4 (equa... 2)

From equa...2

y=4 + 3x (equal...3)

Substitute y=4 +3x into equation 1

- 4x + 2y=2 (equation 1)

-4x + 2(4x + 3x) = 2

-4x + 8x + 6x =2

10x=2

Divide both sides by 10

x=2/10=1/5

x=1/5 or 0.2

Substitute x=0.2 into equation 1

-4x + 2y=2

-4(0.2) + 2y=2

-4.8 + 2y=2

Collect like terms

2y=2 + 4.8

2y=6.8

Divide both side by 2

y=6.8/2

y=3.4

Hence,x=1/5 or 0.2,y=3.4

Step-by-step explanation:

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75