Question

a)278-b+28-136=74
b)575-138+257-a+138+19=659
c)845-676+c-129+174-95=159
d)13+o:8=7
e)c:5xa=8
f)a x a x a x 3=64:8+4 x 4
g)238-173-7 x 7=2 x a
h)2 x 3 + 5 x i - 3 x 2=45

Answer 1

adunarile si scaderile sunt facute direct
daca nu intelegi cum am facut vreo scadere poti incerca separat , dar iti da acelasi rezultat , mult succes ;)
a)278+28-136-b=74
170-b=74
170-74=b
96=b
b)575-138+257-a+138+19=659
851-a=659
a=851-659=192
c)845-676-129+174-95+c=159
119+c=159
c=159-119=40
d)13+o:8=7
o:8=7-13=-6
o=-6*8=-48
e)c:5 x a=8
c:5=8:a
c=8:a x 5
f)a x a x a x 3 = 64:8+4 x 4
3 x a^3 = 8 + 16
a^3 este a la puterea a treia
3 x a^3 = 24
a^3 = 24:3
a^3 = 8
a^3 = 2^3
2^3 -> 2 la puterea 3
a = 2
g) 238-173-7 x 7 = 2 x a
65 - 49 = 2 x a
16 = 2 x a
a =16 : 2
a = 8
h ) 2 x 3 + 5 x i - 3 x 2 = 45
6 + 5 x i - 6 = 45
12 + 5 x i = 45
5 x i = 45-12
5 x i = 33
i = 33 : 5 = 6.6