Question

30. (1) According to the question,
:
[
begin{array}{r}
7 x+5+x+5=90^{circ}
8 x=80^{circ}
x=10^{circ}
end{array}
]

# 30. If (7x + 5)º and (x + 5)º are complementary angles, then find value of x RRB NTPC (Phase I) 2016 (1) 10 (2) 20 (3) 30 (4) 40

Solution