Question

Rezolvati.....
1)8×(x+5)=72       2)-15×(x+6)=120      3)-20×(x-3)= -180

Rezolvare va rog de clasa a 6 a

Answer 1

1. 8 · (x + 5) = 72
x + 5 = 72 : 8 
x + 5 = 9
x = 9 - 5 
x = 4 

2. -15 · (x + 6) = 120 
x + 6 = 120 : (-15)
x + 6 = -8
x = -8 - 6
x = -14

3. -20 · (x - 3) = -180
x - 3 = -180 : (-20)
x - 3 = 9
x = 9 + 3 
x = 12

/robèrtinni

Answer 2

1) 8x+40=72
8x=32, x=4
2)-15x-80=120
-15x=200, x=-13,3
3)-20x+60=-180
-20x=-240, x=12