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Byby108
a fost răspuns

Sa se afle x numar natural:a)12(x+1)-4(x+1)=40
b)7(8-x)+3(8-x)=60

Răspuns :

a) 12x+12-4x+4=40
8x=40-12-4
8x=28-4
8x=24
x=24÷8
x=3
Gabitabubu
a) 12(x+1)-4(x+1)=40=> 12x+12-4x-4=40 =>8x-8=40=> 8x=40-8 => 8x=32 => x= 32/8=4
b)7(8-x)+3(8-x)=60=> 56-7x+24-3x=60=> 80-4x=60=> 4x=20=> x=20/4=5....Sper ca te-am ajutat :)))