Question

Resolva as seguintes expressões :

-5+2x(-8) = ????

-8x(-2) +7 = ???

1513+(-5) = ???

32:(-8)+(20-13) = ???

12+27:9-2x5 = ???

5+7x3-18:(-6) = ???

(4-2) : (-2) + 13 = ???

(4-10) x (15-8) = ???

Answer 1

-5+2x(-8) = -5-16x => -5 = 16x => x=-5/16 ≈ - 0,3125

-8x(-2) +7 = 16x + 7 => 16x = -7 => x = 7/16 ≈ - 0,4375

1513+(-5) = 1513-5 = 1508

32:(-8)+(20-13) = -4 + 7 => 3

12+27:9-2x5 = 12+3-10 = 5

5+7x3-18:(-6) = 5+21-(-3) => 29

(4-2) : (-2) + 13 = -1+13 = 12

(4-10) x (15-8) = -6 x 7 = -42

Espero ter ajudado.