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SwagiDi
@SwagiDi
July 2022
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помогите. Решить уравнение:
а) 21 + 2х = 56; б) у – 89 = 90.
в) 7у – 39 = 717; г) х + 3х = 76.
д)12 + 8,3х + 1,5х = 95,3
е) 6,7у + 13 + 3,1у = 86,5.
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willy56
Verified answer
А) 21+2х=56
2х=56-21
2х=35 :2
х=17,5
б) у-89=90
у=90+89
у=179
в) 7у-39=717
7у=717+39
7у=756 :7
у=108
г) х+3х=76
4х=76 :4
х= 19
д)12+8,3х+1,5х=95,3
12+9,8х=95,3
9,8х=95,3-12
9,8х= 83,3 :9,8
х=8,5
е) 6,7у+13+3,1у=86,5
9,8у+13=86,5
9,8у=86,5-13
9,8у=73,5 :9,8
у=7,5
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Answers & Comments
Verified answer
А) 21+2х=562х=56-21
2х=35 :2
х=17,5
б) у-89=90
у=90+89
у=179
в) 7у-39=717
7у=717+39
7у=756 :7
у=108
г) х+3х=76
4х=76 :4
х= 19
д)12+8,3х+1,5х=95,3
12+9,8х=95,3
9,8х=95,3-12
9,8х= 83,3 :9,8
х=8,5
е) 6,7у+13+3,1у=86,5
9,8у+13=86,5
9,8у=86,5-13
9,8у=73,5 :9,8
у=7,5