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CristianaBCF25
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Să se afle x nr natural:a) 3(x+2)+2x=61 b) 3(2x-4)+x=37. c) 4(7x+1)+12=44 j) 5(x+3)+2(x+3)=56 g) 7+2x+6x=63 ajutorrrrrrr

Răspuns :

Andreearamonat
a)3(x+2)+2x=61
3x+6+2x=61
5x=61-6
5x=55
X=11

B)3(2x-4)+x=37
6x-12+x=37
6x+x=37+12
7x=49
X=7

C)4(7x+1)+12=44
28x+4+12=44
28x=44-12-4
28x=28
X=1

j)5(x+3)+2(x+3)=56
5x+15+2x+6=56
7x=56-6-15
7x=35
X=5

G) 7+2x+6x=63
7+8x=63
8x=63-7
8x=56
X=7

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