Make x the subject of the following
And show the working
a) y=x+2
Subtract 2 from both sides:
y - 2 = x
Therefore, x = y - 2.
b) 3x - 4 = 7
Add 4 to both sides:
3x = 11
Divide both sides by 3:
x = 11/3
Therefore, x = 3.67 (to 2 decimal places).
c) 4x + 3y = 8
Subtract 3y from both sides:
4x = 8 - 3y
Divide both sides by 4:
x = (8 - 3y)/4
Therefore, x = 2 - 0.75y.