Question

Afla valoarea termenului necunoscut:
a)(6*6-27)*f=81
b) (394-123-g):2=108
c) 6*5:10+h=296
d) [(124+692)-400*2]:i=4
e) (24:3+45:5)+143=4*j+124
f) 12*2:k=4

Answer 1

a)(6*6-27)*f=81
(36-27)*f=81
9*f=81
f=81:9
f=9

b) (394-123-g):2=108
 (271-g):2=108
 (271-g)=108x2
271-g=216
g=271-216
g=55

c) 6*5:10+h=296
30:10+h=296
3+h=296
h=296-3
h=293

d) [(124+692)-400*2]:i=4
(816-800):i=4
16:i=4
i=16:4
i=4

e) (24:3+45:5)+143=4*j+124
8+9+143=4*j+124
17+143-124=4*j
4*j=160-124
4*j=36
j=36:4
j=9

f) 12*2:k=4
24:k=4
k=24:4
k=6

Answer 2

a) (6*6-27)*f=81
(36 - 27)×f = 81
9×f = 81
f = 81 : 9
f = 9

b) (394-123-g):2=108
(271 - g) : 2 = 108
271 - g = 108 × 2
271 - g = 216
g = 271 - 216
g = 55

c) 6*5:10+h=296
30 : 10 + h = 296
3 + h = 296
h = 296 - 3
h = 293

d) [(124+692)-400*2]:i=4
(816 - 800) : i = 4
16 : i = 4
i = 16 : 4
i = 4

e) (24:3+45:5)+143=4*j+124
(8 + 9) + 143 = 4×j + 124
17 + 143 = 4×j + 124
160 = 4×j + 124
4×j = 160 - 124
4×j = 36
j = 36 : 4
j = 9

f) 12*2:k=4
24 : k = 4
k = 24 : 4
k = 6