Aflati x din: imagine pls dau coroana si hartie de wc

Răspuns:
Explicație pas cu pas:
a)x=14cm8mm-8cm 9mm=13cm18mm-8cm 9mm=5cm 9mm
b)x=6cm7mm+14cm8mm=20cm15mm
c)x+2x/3=12cm 5mm 5x=3×12cm 5mm 5x=36cm25mm
x=7cm 35 mm
d)x-x/3=11cm2mm 2x=3×11cm2mm 2x=33cm6mm
x=16cm16mm