а)2х-5=27
2х=27+5
2х=32
х=32/2
х=16
б)-3+4у=-5
4у=-5+3
4у=-2
у=-2/4
у=-0,5
д)2х-(5х-6)=7+(х-1)
2x – 5x + 6 = 7 + x – 1
2x – 5x – x = – 1 + 7 – 6
x = 0
е)3х-1=2х-(4-х)
3x – 1 = 2x – 4 + x
3x – 2x – x = – 4 + 1
0x = -3
уравнение решений не имеет
ж) 2(х-3)=-3(х+2)
2x – 6 = – 3x – 6
2x + 3x = – 6 + 6
з) 2(х-5)-7(х+2)=1
2x – 10 – 7x – 14 = 1
2x – 7x = 1 + 14 + 10
-5x = 25
x = -5
а)2х-5=27
2х=27+5
2х=32
х=32/2
х=16
б)-3+4у=-5
4у=-5+3
4у=-2
у=-2/4
у=-0,5
д)2х-(5х-6)=7+(х-1)
2x – 5x + 6 = 7 + x – 1
2x – 5x – x = – 1 + 7 – 6
x = 0
е)3х-1=2х-(4-х)
3x – 1 = 2x – 4 + x
3x – 2x – x = – 4 + 1
0x = -3
уравнение решений не имеет
ж) 2(х-3)=-3(х+2)
2x – 6 = – 3x – 6
2x + 3x = – 6 + 6
x = 0
з) 2(х-5)-7(х+2)=1
2x – 10 – 7x – 14 = 1
2x – 7x = 1 + 14 + 10
-5x = 25
x = -5