Question

упростите выражение:4а+90а,86b-77b,209m+m,302n-n
решите уравнения
14x+27x=656
81y-38y=645
49z-z=384
102k-4k=1960

Answer 1

4а+90а=94а
86б-77б=9б
209м+м=210м
302н-н=301н
$$$$$$$$$$$$$$
14х+27х=656
41х=656
х=656÷41
х=16
$$$$$$$$$$$$$$$
81у-38у=645
43у=645
у=645÷43
у=15
$$$$$$$$$$$$$$$$
49z-z=384
48z=384
z=384÷48
z=8
$$$$$$$$$$$$$$$$
102k-4k=1960
98k=1960
k=1960÷98
k=20
$$$$$$$$$$$$$$$$$

Answer 2

4а+90 а = 94а
86b-77b=9b
209m+m = 210m
302n-n=301n

1.14x+27x=656
14x+27x = 41x
x=656:41 = 16

2.  81y-38y= 645
81y-38y=43y
y=645:43 = 15


3.49z-z=384
49z-1z=48z
z=384:48 = 8

4. 102K-4k=1960
102k-4k=98k
k=1960:98 = 20