Question

vă rog urgent îmi trebuie aceste 2 ex​

Answer 1

Răspuns:

Explicație pas cu pas:

5a) x +2x = 90,  3x = 90,  x = 30

b) x +8x = 90, 9x = 90,  x = 10

c) x + x+20 = 90, 2x = 70,  x = 35

d) x + x -40 = 90, 2x = 130, x = 65

6a) x +3x = 180,  4x = 180,  x  = 45

b) x +5x = 180,  6x = 180, x = 30

c) x + x+50 = 180,  2x = 130,  x = 65

d) x +x-150 = 180,  2x = 230,  x = 115