Question

Bună cn mă poate ajuta și pe mine la ex 16

Answer 1

a.
8×3+x=30
24+x=30
x=30-24
x=6
b.
y-7×8=12
y-56=12
y=56+12
y=68
c.
z+5×4=40
z+20=40
z=40-20
z=20
d.
7×8+2×4+m=70
56+8+m=70
64+m=70
m=70-64
m=6
e.
8×7-7×8+n=243
56-56+n=243
0+n=243
n=243-0
n=243
f.
(2×5+7×9)-p=39
(10+64)-p=39
74-p=39
p=74-39
p=35
g.
u+7×7=60
u+49=60
u=60-49
u=11
h.
v-(3×8+6×8)=45
v-(24+48)=45
v-72=45
v=72+45
v=117
i.
t-(5×9-3×6)=30
t-(45-18)=30
t-63=30
t=63+30
t=93
Sper ca te-am ajutat

Answer 2

a)8 x 3 + x=30 <=> 24+x=30 <=> x=30-24 <=> x=6 <=> S={6}
b)y-7 x 8=12 <=> y-56=12 <=> y=12+56 <=> y=68 <=> S={68}
c)z+ 5 x 4 =40 <=> z+20=40 <=> z=40-20 <=> z=20 <=> S={20}
d)7 x 8 + 2 x 4 +m =70 <=> 56+8+m=70 <=> 64+m=70 <=> m=70-64 <=> m=6<=> S={6}
e)8 x 7 - 7 x 8 +n= 243 <=> 56-56+n=243 <=> 0+n=243 <=> n=243<=> S={243}
f)( 2 x 5 + 7 x 9 )-p=39 <=>  ( 10+63 )-p=39 <=> 73-p=39 <=> p=73-39 <=> p=34 <=> S={34}
g)u+7 x 7=60 <=> u+49=60 <=> u=60-49 <=> u=11 <=> S={11}
h)v- (3 x 8 + 6 x 8 )=45 <=> v-(24+48) = 45 <=> v-72=45 <=> v=45+72 <=> v=117 <=> S={ 117}
i)t- ( 5 x 9 - 3 x 6) = 30 <=> t-(45-18)=30 <=> t-27=30 <=> t=30+27 <=> t=57<=> S={ 57}
Sper ca te-am ajutat !