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Ееееее11557
@Ееееее11557
August 2022
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88 и 89 решите пожайлуста
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MissMyata
88
а) 2а - (14 - 3а) = -10
2а - 14 + 3а = -10
2а + 3а = -10 + 14
5а = 4 | :5
а = 4
5
б) (9 - 2b) - (b + 5) = 16
9 - 2b - b - 5 = 16
-2b - b = 16 - 9 + 5
-3b = 12 | : (-3)
b = -4
в) - (4с - 7) = 5с + (11 - 7с)
-4с + 7 = 5с + 11 - 7с
-4с - 5с + 7с = 11 - 7
-2с = 4 | : (-2)
с = -2
г) -6х + 2(5 - 3х) = 8
-6х + 10 - 6х = 8
-6х - 6х = 8 - 10
-12х = -2 | : (-12)
х = 1
6
д) 18 - 4у = 7(2 - у) + 6
18 - 4у = 14 - 7у + 6
-4у + 7у = 14 + 6 - 18
3у = 2 | : 3
у = 2
3
е) 4(-2z + 5) = 14 - 2(4z - 3)
-8z + 20 = 14 - 8z + 6
-8z + 8z = 14 + 6 - 20
0 = 0
1 votes
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Answers & Comments
а) 2а - (14 - 3а) = -10
2а - 14 + 3а = -10
2а + 3а = -10 + 14
5а = 4 | :5
а = 4
5
б) (9 - 2b) - (b + 5) = 16
9 - 2b - b - 5 = 16
-2b - b = 16 - 9 + 5
-3b = 12 | : (-3)
b = -4
в) - (4с - 7) = 5с + (11 - 7с)
-4с + 7 = 5с + 11 - 7с
-4с - 5с + 7с = 11 - 7
-2с = 4 | : (-2)
с = -2
г) -6х + 2(5 - 3х) = 8
-6х + 10 - 6х = 8
-6х - 6х = 8 - 10
-12х = -2 | : (-12)
х = 1
6
д) 18 - 4у = 7(2 - у) + 6
18 - 4у = 14 - 7у + 6
-4у + 7у = 14 + 6 - 18
3у = 2 | : 3
у = 2
3
е) 4(-2z + 5) = 14 - 2(4z - 3)
-8z + 20 = 14 - 8z + 6
-8z + 8z = 14 + 6 - 20
0 = 0