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rezolvati ecuatiile=
a) 7(x+1)=1 3/4
b) 1,5(x+2-9)=2,25
c)14/(x-1)=7/4
P.S= bara ,,/'' aceasta inseamna ,,supra''.
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Răspuns :

Emi612
b) x=8,5
c) x=9
Pe a nu stiu sa-l fac
Bibi2350
a)7x+7=7/4
7x=7/4÷7
7x=7/4÷7/1
7x=7/4×1/7
7x=1/4
x=1/4÷7
x=1/4×1/7
x=1/28

b)1,5x-10,5=2,25
1,5x=2,25+10,5
1,5x=12,75
x=8,5

c)7 (x-1)=14×4
7x-7=56
7x=56+7
7x=63
x=63/7
x=9

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