Question

Find the value of x (LAST QUESTION)

Answer 1

9. 13x+12 = 129

=> x=117/13 = 9

10.7x-10+(12x+19)= 180

19x+9= 180

x= 171/19

= 9

Answer 2

9. x= 9

10. x= 9

Explanation:

9. 13x+12= 129

13x=129-12

x=117/13=9

10.180-(7x-10)= 12x+19

180-7x+10=12x+19

190-7x=12x+19

190=19x+19

190= 19(x+1)

190/ 19=x+1

10=x+1

9=x