Question

2•(3•x+5)+5=51



5-[8•(7•x-16)-17]-16=99​

Answer 1

scuze am rezolvat numai una, succesฅ^•ﻌ•^ฅ

Answer 2

Răspuns:

6,3

Explicație pas cu pas:

2×(3x +5)+5 =51

2 ×(3x +5) =51-5

2×(3x +5)=46

3x+5 =46:2

3x+5=23

3x=23 - 5

3x=18

x=18:3

x=6

5-[8×(7x - 16)-17]-16=99

5-[8×(7x - 16)-17]=99+16

5-[8×(7x - 16)-17]=115

8 ×(7x - 16)-17 =115 :5

8 ×(7x - 16) - 17 =23

8 ×(7x - 16) =23 +17

8 ×(7x - 16) =40

7x - 16 =40 :8

7x - 16 =5

7x =5 +16

7x =21

x=21 :7

x=3