Question

1.2x+5=9x-10
= ?????
2.5y+5=4y+3

Answer 1

Yang ditanya nilai x sama y-nya?
1.
2x+5 =9x-10
2x-9x = -10-5
-7x = - 15
7x = 15
x = 15/7

2.
5y + 5 = 4y+3
y = -2

Answer 2

1.) 2u -9u = -10 -5
         -7u = -15
           u = -15/-7
           u = -2  1/7
2.) 5y-4y = 3-5
           y = -2