РЕШИТЕ УРАВНЕНИЯ! помогите. Created by SANEKPLAY777. matematika-ru

РЕШИТЕ УРАВНЕНИЯ! помогите...

OlyaMemory05 51) (29х+172):3=125 52) (3х+27)*5=180
29х+172=125*3 3х+27=180:5
29х+172=375 3х+27=36
29х=375-172 3х=36-27
29х=203 3х=9
х=203:29 х=9:3
х=7 х=3

53) 12х-35-4х=21
8х=21+35
8х=56
х=56:8
х=7

3 votes Thanks 7

oksik1970 51)
(29x+172)÷3=125
(29x+172)=125×3
(29x+172)=375
29x=375-172
29x=203
x=203÷29
x=7
_____________
52)
(3x+27)×5=180
3x+27=180÷5
3x+27=36
3x=36-27
3x=9
x=9÷3
x=3
_____________
53)
12x-35-4x=21
8x=21+35
8x=56
x=56÷8
x=7
_____________
54)
25(x-1)-16=59
25×(x-1)=59+16
25×(x-1)=75
x-1=75÷25
x-1=3
x=3+1
x=4
_____________
55)
13(x+6)-150=123
13(x+6)=123+150
13(x+6)=273
x+6=273÷13
x+6=21
x=21-6
x=15
_____________
56)
18y+8y=572
26y=572
y=572÷26
y=22
_____________
57)
(90x+20)÷4=50
(90x+20)=50×4
(90x+20)=200
90x=200-20
90x=180
x=180÷90
x=2
_____________
58)
2×61x-232=500
2×61x=500+232
2×61x=732
61x=732÷2
61x=366
x=366÷61
x=6
_____________
59)
28x+18x=2300
46x=2300
x=2300÷46
x=50
_____________
Проверка если нужна сделаешь сам. Удачи!

4 votes Thanks 7

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