Question

in a in a triangle angle b is equal to 45 degree angle Q is equal to bracket 3 X + 16 close bracket degrees angle R is equal to 60 degrees find the value of x

Answer 1

45+60+3x+10=180
121+3x=180
3x=180-121
3x=59
x=59/3
x=19.67

Answer 2

In a triangle since the sum of 3 angles is 180 degrees.
Therefore
45+60+(3x+16)=180
105+3x+16=180
3x+121=180
3x=180-121=59
X=59/3=19.66

Hope this helps