Explicación paso a paso:
x+5=7
x=7-5
x=2
y+3=9
y=9-3
y=6
B-4=11
B=11+4
B=15
z-6=10
z=10+6
z=16
2+a=8
a=8-2
a=6
5+x=12
x=12-5
x=7
M+9=3
M=3-9
M=-6
T+12=10
T=10-12
T=-2
8x+5=4x+13
8x-4x=13-5
4x=8
x=8/4
6y+2=y+17
6y-y=17-2
5y=15
y=15/5
y=3
7m+4=6m+7
7m-6m=7-4
m=3
11n+3=10n+11
11n-10n=11-3
n=8
5x-4=2x+5
5x-2x=5+4
3x=9
x=9/3
x=3
9a-10=3a+2
9a-3a=2+10
6a=12
a=12/6
a=2
De nada :)
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Explicación paso a paso:
x+5=7
x=7-5
x=2
y+3=9
y=9-3
y=6
B-4=11
B=11+4
B=15
z-6=10
z=10+6
z=16
2+a=8
a=8-2
a=6
5+x=12
x=12-5
x=7
M+9=3
M=3-9
M=-6
T+12=10
T=10-12
T=-2
8x+5=4x+13
8x-4x=13-5
4x=8
x=8/4
x=2
6y+2=y+17
6y-y=17-2
5y=15
y=15/5
y=3
7m+4=6m+7
7m-6m=7-4
m=3
11n+3=10n+11
11n-10n=11-3
n=8
5x-4=2x+5
5x-2x=5+4
3x=9
x=9/3
x=3
9a-10=3a+2
9a-3a=2+10
6a=12
a=12/6
a=2
De nada :)