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a. 4 + 5 4 = 4 1 + 5 4 = 16 4 + 5 4 = 21 4
b. 3 4 + 1 3 = 9 12 + 4 12 = 13 12
c. 2 3 + 7 15 − 3 5 = 10 15 + 2 15 − 9 15 = 10 + 7 − 9 15 = 8 15
d. 13 6 + 5 3 − 2 = 13 6 + 10 6 − 12 6 = 13 + 10 − 12 6 = 11 6
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a)136-x=400/8+7
136-x=50+7
136-x=57
x=136-57
x=79
b)x+x+x+15=21
3x=21-15
3x=6
x=6/3
x=2
c)35+x+27=80
62+x=80
x=80-62
x=18
a)136-x=400:8+7
136-x=57
x=136-57
x=79
b)x+x+x+15=21
x*3+15=21
x*3=21-15
x=6:3
x=2
c)35+x+27=80
35+x=80-27
x=53-35
x=18
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1) 540 :x + 126 :x = 18
=> (540 + 126) : x = 18
=> 666 : x = 18
=> x = 666 : 18
=> x = 37
2) 4982 + x . 136 - 854 = 14328
=> 4128 + x . 136 = 14328
=> x . 136 = 14328 - 4128
=>x . 136 = 10200
=> x = 10200 : 136
=> x = 75
1.
540 : x + 126 : x = 18
x * (540 + 126)=18
x*666=18
x=1/37
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35/46:(35/17+3/18)
35/46:227/102
35/46×102/227
1785/5221
TL:35136:18=1952
35136 : 18 = 1952