x+75=57 t -34=-35 3-x=-2x 5y=13 7a+7=35
x+75=57
x=57-75
x=-18
t-34=-35
t=-35+34
t=-1
3-x=-2x
-x+2x=-3
x=-3
5y=13 |:5
y=13/5= 2 3/5
7a+7=35
7a=35-7
7a=28 |:7
a=4
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x+75=57
x=57-75
x=-18
t-34=-35
t=-35+34
t=-1
3-x=-2x
-x+2x=-3
x=-3
5y=13 |:5
y=13/5= 2 3/5
7a+7=35
7a=35-7
7a=28 |:7
a=4
b. t=-1
c. -3
d. y=2,6
e. a=4