Rozwiąż równania :
a) -3x=2x-10
b) 2x-2=7-x
c) 10=4-2x
d) -(2x-1)=4
e) 2(x+1)=x
f) 2t-(3t+1)=6
g) -(4+x)=2(3-x)
h) 3(y+6)-y=2(y+9)
i) (x-7)-2(3x+5)=3
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a) -3x=2x-10
-5x = -10 /:(-5)
x = 2
b) 2x-2=7-x
3x = 9 /:3
x = 3
c) 10=4-2x
2x = -6 /:2
x = -3
d) -(2x-1)=4
-2x + 1 = 4
-2x = 3 /:(-2)
x = -1,5
e) 2(x+1)=x
2x + 2 = x
x = -2
f) 2t-(3t+1)=6
2t - 3t - 1 = 6
-t = 7 /:(-1)
t = -7
g) -(4+x)=2(3-x)
-4-x = 6 - 2x
-x + 2x = 6 + 4
x = 10
h) 3(y+6)-y=2(y+9)
3y + 18 - y = 2y + 18
3y - y - 2y = 18 - 18
0 = 0 równanie tożsamościowe.
i) (x-7)-2(3x+5)=3
x-7-6x - 10 = 3
-5x = 20 /:(-5)
x = -4