Question

rezolvati ecuatiile
a)2(x+3)+17=59
b)7(x-2)+9=44
c)8(x+3)+7=71
d)5(2x-11)+17=52
e)6(3x+4)+15=201
f)17(2x+3)-25=366
g)4(5x-12)-34=118
h)125-3(2x-1)=98
i)238-5(x-1)=193

Answer 1

Răspuns:

Explicație pas cu pas:

a) 2(x+3)+17=59 <=> 2x+6+17 = 59 => 2x = 59-23 => 2x = 36 =>

x = 36:2 => x = 18

b) 7(x-2)+9=44 <=> 7x-14+9 = 44 => 7x = 44+5 => 7x = 49 =>

x = 49:7 => x = 7

c) 8(x+3)+7=71 <=> 8x+24+7 = 71 => 8x = 71-31 => 8x = 40 =>

x = 40:8 => x = 5

d) 5(2x-11)+17=52 <=> 10x-55+17 = 52 => 10x = 52+55-17 =>

10x = 90 => x = 90:10 => x = 9

e) 6(3x+4)+15=201 <=> 18x+24+15 = 201 => 18x = 201-39 =>

18x = 162 => x = 162:18 => x = 9

f) 17(2x+3)-25=366 <=> 34x+51-25 = 366 => 34x = 366-51+25 =>

34x = 340 => x = 340:34 => x = 10

g) 4(5x-12)-34=118 <=> 20x-48-34 = 118 => 20x = 118+82 =>

20x = 200 => x = 200:20 => x = 10

h) 125-3(2x-1)=98 <=> 125-6x+3 = 98 => 6x = 128-98 =>

6x = 30 => x = 30:6 => x = 5

i) 238-5(x-1)=193 <=> 238-5x+5 = 193 => 5x = 243-193 =>

5x = 50 => x = 50:5 => x = 10