Question

A) 5 ori x minus 15 egal 0 b) 4 ori x plus 16 egal 20 c) minus 3 ori x plus 11 egal minus 1 d) minus 2 ori x minus 200 egal e) 21 egal 7 ori x minus 21 f) 10 ori x plus 99 egal 88 ​

Answer 1

Răspuns:

5x X -15=0

5x=15

x=3

b). 4x+16=20

4x=20-16

4x=4

x=1

c). -3x+11= -1

-3x= -1-11

-3x= -12

x=4

d). - 2x -200=??

e). 21=7x-21

21+21=7x

42=7x

x=6

f). 10x+99=88

10x=88-99

10x=-11

x=-11/10=- 1,1