Question

487 решите уравнение: д) 38x+15=19 e) 44:z+9=20

Answer 1

(х-12)*8=56х-12=56/8х-12=7х=7+12х=19.....................24*(z+9)=288z+9=288-24z+9=264z=264-9z=255......................(у+25)/8=16у+25=8*16у+25=128у=128-25у=103............................124/(у-5)=31у-5=124/31у-5=4у=5+4у=9......................38*х+15=9138*х=91-1538*х=76х=76/38х=2...................44/z+9=2044/z=20-944/z=11z=44/11z=4

Answer 2

(х-12)*8=56

х-12=56/8

х-12=7

х=7+12

х=19

.....................

24*(z+9)=288

z+9=288-24

z+9=264

z=264-9

z=255

......................

(у+25)/8=16

у+25=8*16

у+25=128

у=128-25

у=103

............................

124/(у-5)=31

у-5=124/31

у-5=4

у=5+4

у=9

......................

38*х+15=91

38*х=91-15

38*х=76

х=76/38

х=2

...................

44/z+9=20

44/z=20-9

44/z=11

z=44/11

z=4