Question

Afka nr necunoscute din exercitiile date----> A) 7+6×(x:4-18)=25 -------> B)286+(a-113):5=142 -------> C) [93:(x:3)-16×]×6=183
Dau coroana

Answer 1

A) 7+6×(X:4-18) = 25
6×(X:4-18) = 25-7
6×(X:4-18) = 18
X:4-18 = 18:6
X:4-18 = 3
X:4 = 3+18
X:4 = 21
X = 21×4
X = 84

B) 286+(a-113):5 = 142
(a-113) : 5 = 142-286
(a-113 ) :5 = -144
a-113 = -144×5
a-113 = -720
a = -607

C) [93:(x:3)-16]×6=183
93:(X:3)-16 = 183:6
93:(X:3) = 30,5+16
93: ( X:3) = 46,5
X:3 = 93 : 46,5
X:3 = 2
X = 2×3
X = 6