Question

va rog mult ajutati ex 7. aflati x: a b c d va rog mult dau coroana

Answer 1

a)8cm+9mm+x=14cm+8mm
8cm=80mm
14cm=140mm
89mm+x=148mm
x=148mm-89mm
x=49mm=4,9cm=4cm+9mm
b)6cm+7mm+14cm+8mm=x
x=60mm+7mm+104mm+8mm=179mm=17cm+9mm
c)2/3x+x=12cm+5mm=120mm+5mm=125mm
2/3x+x=125mm//aplificam x si 125 cu 3 ca saeliminam numitorul//
2x+3x=375mm
5x=375 
x=75mm=7cm=5mm.
d)1/3x+11cm+2mm=x
1/3x+112mm=x//amplificam 112 si x cu 3 ca sa eliminam numitorul//
x+112mm=3x
112=3x-x
112=2x
x=56.