Question

Rezolva excercitile urmatoare
a)4x24+4x56
b)100x24-100x14
c)3x+4+=19
d)10x+4,1=21,2
e)10x-7=14
20 de puncte dau

Answer 1

a)4×24+4×56=96+224=330

b)100×24-100×14=2400-1400=1000

c)3x+4=19

3x=19-4=15

$x = \frac{15}{3} = 5$

d)10x+4,1=21,2

10x=21,2-4,1=17,1

$x = \frac{17,1}{10} = 1,71$

e)10x-7=14

10x=14+7=21

$x = \frac{21}{10} = 2,1$

Answer 2

a) 96 + 224 = 320 b) 2400-1400 = 1000 c) 3x = 19-4 3x = 15 x = 5 d) 10x = 21,2-4,1 10x = 17,1 x = 1,71 e) 10x = 14+7 10x = 21 x = 21/10