algebraic equation and inaqualities
posted by tanya .
in a triangle XYZ,the measure of angle Y is 40 more than the measure of angle X.the measure of angle Z is 10 less than three times the measure of angle X.find the measure of angle X

Y = X+40
Z = 3X10
X+Y+Z = 180
X + X+40 + 3X10 = 180
5X = 150
X = 30