1) 3x + 4 = 16
3x = 16 - 4
3x = 12
3x/3 = 12/3
x = 3
2) y = mx + b (linear equation involving two variables, in Cartesian Plane)
y = 4x + 6
3) 5z = 5
5z/5 = 5/5
z = 1
4) 10y - 25 = 45
10 = 45 + 25
10y = 70
10y/10 = 70/10
y = 7
5) 3 (5x - 2) = 12x +18
15x - 6 = 12x + 18
15x - 12x = 18 + 6
3x = 24
3x/3 = 24/3
x = 8
NOTE: Linear equations have a degree of 1, meaning the leading term has an exponent of 1, which is understood if not written.
