y = -1/2 x + 1
y = 4/5 x - 2
y = 5/2 x + 10
Step-by-step explanation:
Note: Division of same sign gives positive number. Division of opposite signs give negative number.
a) x + 2y = 2
The slope intercept form: y = mx + c
rewriting in the form above:
2y = -x + 2
divide both sides by 2:
2y/2 = -x/2 + 2/2
y = -1/2 x + 1
b) 4x - 5y = 10
rewriting in the form above:
-5y = -4x + 10
divide both sides by -5:
-5y/-5 = -4x/-5 + 10/-5
y = 4/5 x - 2
c) 2y - 5x = 20
2y = 5x + 20
divide both sides by 2:
2y/2 = 5x/2 + 20/2
y = 5/2 x + 10