реши уравнения 1) (20+m) /2=26 2) (45-n) /3=10*3 3) (160+x)-40=300 4) 225 /(c+5=15

Question

реши уравнения 1) (20+m) /2=26 2) (45-n) /3=10*3 3) (160+x)-40=300 4) 225 /(c+5=15

Answer 1

1. 20+m=26*2          3.160+x=300+40

    20+m=52                  160+x=340

    m=52-20                   x=340-160

    m=32                         x=180

2. (45-n)/3=30          4. c+5=225/15

    45-n=30*3                 c+5=15

    45-n=90                     c=15-5

    n=90-45                     c=10

    n=45

Answer 2

(20+m)/2=26

20+m=26*2

20+m=52

m=52-20

m=32

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(20+32)/2=26

 

(45-n)/3=10*3

45-n=30*3

n=45-90

n=-45

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(45-(-45))/3=10*3

 

(160+x)-40=300

160+x=300+40

x=340-160

x=180

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(160+180)-40=300

 

225/(c+5)=15

c+5=225/15

c+5=15

c=15-5

c=10

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 225/(10+5)=15