Question

SOMEONE KINDLY HELP ME WITH THE LAST THREE EQUATIONS :( PLSS THANK YOU

Answer 1

18. x = 10

19. x = 16

20. x = 15

Answer 2

No. 18

`(2x + 15) + (10x + 45) = 180`

`12x + 60 = 180`

`12x = 180 - 60`

`12x = 120`

`x = (120)/(12)`

`\boxed{x = 10}`

.

No. 19

`5x + 60 + 40 = 180`

`5x + 100 = 180`

`5x = 180 - 100`

`5x = 80`

`x = (80)/(5)`

`\boxed{x = 16}`

.

No. 20

`4x + 80 + 100 + 120 = 360`

`4x + 300 = 360`

`4x = 360 - 300`

`4x = 60`

`x = (60)/(4)`

`\boxed{x = 15}`