Question

[0,25+2*(x+1,25)]*3+0,25=13 vreau tot calculul scris ofer 50p.
*=ori

Answer 1

[0,25+2*(x+1,25)]*3=13-0.25
[0,25+2*(x+1,25)]=12.75/3
2x+2,5=4.25-0,25
2x=4-2.5
x=1,5/2
x=0.75
[0,25+2*(0,75+1,25)]*3+0,25=13