Question

1.) [13+(-8+10)]:(-5) = ?
2.) (-2)la a 6 x[-3=(15-4)]:2 la a 8
3.)solutia acuatiei 2x+17=-3x+7 este rep de nr intreg ???

Answer 1

$1).[13+(-8+10)]:(-5)=(13+2):(-5)=15:(-5)=-3 \\ 2).(-2)^6*[-3+(15-4)]:2^8=64*(-3+11):256= \\ =(64*8):256=512:256=2 \\ 3).2x+17=-3x+7 \\ 2x+3x=7-17 \\ 5x=-10 \\ x=- \frac{10}{5} \\ x=-2$