A=3B
B=(x+2)
A+B= 128
Now substitute
3B+B=128
3(x+2)+(x+2)=128
3x+6+x+2=128
4x+8=128
4x=120
x=30
Angle A is three times the measure of angle B. The sum of their measures is 128 degrees. Angle B is (x + 2) degrees. Find the value of x.
2 answers
if <A is degrees, how big is <B