X+x+3=27;1,1x+x+1,1;2x-50=x+70

Question

X+x+3=27;1,1x+x+1,1;2x-50=x+70

Answer 1

1) X+x+3=27
2x=27-3
2x=24
x=12
2) 1,1x+x+1,1=2.1x+1.1
2x-50=x+70
x=70+50
x=120

Comments

3)2х-50=х+70

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2х-х=70+50

Answer 2

1) 2х=24
х=12
2) 2,1х=- 1, 1
х=- 1,1/2.1
3)х=120