Question

rezolvati in mulțimea numerelor întregi ecuatiile a) 2x+7=3+x-2 b) 4x+7+x=7+2x+2x c) 3x-5+5x+7=3x+12+4x d) 5x+4-3x+1=x+3+2x-9 dau coroanaaaa​

Answer 1

Explicație pas cu pas:

a) 2x+7=3+x-2 => 2x+7=1+x => 2x-x=1-7 => x=-6

b) 4x+7+x=7+2x+2x => 5x+7=7+4x=> 5x-4x=7-7 => x=0

c) 3x-5+5x+7=3x+12+4x => 8x+2=7x+12 => 8x-7x=12-2 => x=10

d) 5x+4-3x+1=x+3+2x-9 => 2x+5=3x-6=>2x-3x=-6-5 => -x=-11 => x=11