Question

The first one I know but the other two I need help with

Answer 1

a) 44

b) 11

c) 4

Explanation:

a) x + 46 = 90

x = 90 - 46

x = 44

b) 9x + 81 = 180

9x = 180 - 81

9x = 99

x = 11

c) (5x + 30) + 40 = 90

(5x + 30) = 90 - 40 = 50

5x + 30 = 50

5x = 50 - 30

5x = 20

x = 4