Question

Afla numerele necunoscute din exercitiile:7+6x (x:4-18)=25. 286+(a-113):5=142. [93:(x:3)-16x4]x6=186. Va rog e urgent

Answer 1

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


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

[93:(x:3)-16x4]x6=186
93:(X:3)-64 = 186:6
93:(X:3)-64 = 31
93:(X:3) = 31+64
93:(X:3) = 95
X:3 = 93/95
X = 93×3/95
X = 279/95