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x+x-10=12000
2x=12010
x=12010:2
x=6005
b)x+x*3=95zł
4x=95
x=95:4
x=23,75
2x - 10 = 12000zł
2x=12000+10
2x = 12010/:2
x=6005
b)x+x*3=95zł
4x=95zł/:4
x=23zł 75gr.
x+(x-10)=12000zł
2x-10=12 000 /+10
2x=12 010 /:2
x=6005
spr.
6005+(6005-10)=12000
6005+5995=12000
12000=12000
L=P
b)x+x*3=95zł
x+3x=95
4x=95 /:4
x=23,75
spr.
23,75+3*23,75=95
23,75+71,25=95
95=95
L=P