Question

Rezolvati ecuatiile: 7,25-x=2,3+0,15; x+1,21-7,29=10; 0,3x-2,5=0,1x+21, 5

Answer 1

7,25 - x = 2,3 + 0,15 ⇒ x = 7,25 - 2,45 ⇒ x = 4,8
x + 1,21 - 7,29 = 10 ⇒ x = 10 + 7,29 - 1,21 = 16,08
0,3x - 2,5 = 0,1x + 21,5 ⇒ 0,3x = 0,1x + 24 ⇒ 0,2x = 24 ⇒ x = 24 × 5 = 120

imi dai coroana?

Answer 2

a)
7,25-x=2,3+0,15
x=7,25-2,3-0,15
x=4,95-0,15
x=4,8
b)
x+1,21-7,29=10
x=10-1,21+7,29
x=8,79+7,29
x=16,08
c)
0,3*x-2,5=0,1*x+21,5
0,3*x-0,1x=21,5+2,5
0,2*x=24
x=24/0,2
x=120/2
x=120