(+5)(+3)=+15

解答

(+ 5) (+ 3) = + 15

真

求解步骤

(5) (3) = 15

化简

(5) (3) : 15

15 = 15

两侧相等

真

(x - 2) + (x + 3) + (x + 7) + (x - 4) = 360

f = lo g_{3} (9)

(80 - x) = 9 x

\frac{x + 1}{2} + \frac{x - 1}{3} = \frac{1}{6}

- \frac{5}{6} z - 3 = 47