Question

I need help with 3 and 4 please!

Answer 1

3) x=10

Explanation:

9x-16 +3x+11 +7x -5 =180[ sum of

interior angle of

triangle ]

19x -10 =180

19x =190

x=10

4)

2x-12 +4x+43=9x -26

or, 6x + 31= 9x -26

or, 31 +26 = 9x -6x

or, 57 = 3x

or, 19 =x

reason of this question is given up