Б) 8х-5=х-40
8x – x = – 40 + 5
7x = -35
x = -5
В) 7t +21=t-3
7t – t = – 3 – 21
6t = -24
t = -4
Г) 9+13у=35+26у
13y – 26y = 35 – 9
-13y = 26
y = -2
Д) 9-(8х-11)=12
9 – 8x + 11 = 12
– 8x = 12 – 11 – 9
-8x = -8
x = 1
12=(7х-9)-(11-х)
12 = 7x – 9 – 11 + x
– 7x – x = – 11 – 9 – 12
-8x = -32
x = 4
11х+103=1+(12х-31)
11x + 103 = 1 + 12x – 31
11x – 12x = – 31 + 1 – 103
-x = -133
x = 133
Б) 8х-5=х-40
8x – x = – 40 + 5
7x = -35
x = -5
В) 7t +21=t-3
7t – t = – 3 – 21
6t = -24
t = -4
Г) 9+13у=35+26у
13y – 26y = 35 – 9
-13y = 26
y = -2
Д) 9-(8х-11)=12
9 – 8x + 11 = 12
– 8x = 12 – 11 – 9
-8x = -8
x = 1
12=(7х-9)-(11-х)
12 = 7x – 9 – 11 + x
– 7x – x = – 11 – 9 – 12
-8x = -32
x = 4
11х+103=1+(12х-31)
11x + 103 = 1 + 12x – 31
11x – 12x = – 31 + 1 – 103
-x = -133
x = 133