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x - y = -45x - y = 8Notice the equations are NOT in slope-intercept form.Rewrite them in y= mx +b

Sagot :

Step 1: Problem

x - y = -4 --------------------------- 1

5x - y = 8 --------------------------- 2

Step 2: Concept

Use substitution method

Step 3: Method

Make x subject of formula from equation 1 and substitute in equation 2 to find y.

from equation 1: x - y = -4

x = - 4 = y

substitute x into equation 2.

5x - y = 8

5(-4 + y ) - y = 8

- 20 + 5y - y = 8

5y - y = 8 + 20

4y = 28

y = 28/4

y = 7

from x = - 4 + y

x = - 4 + 7

x = 3

Step 4: Final answer

x = 3 and y = 7

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