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2x + 3 = 7
4 - 3x =-5
4x + 5 - x = -7
3x - 6 =12
10 = 4 -2x
a)
2x = 4 /:2
x = 2
Spr.
L = 2*2 + 3 = 7
P = 7
b)
-3x = -9 /:(-3)
x = 3
L = 4 - 3 *3 = 4 - 9 = -5
P = - 5
c)
3x = -12 /:3
x = -4
Spr .
L = 4(-4) + 5 - (-4) = -16 + 5 + 4 = -7
P = -7
d)
3x = 18 /:3
x = 6
L= 3*6 - 6 = 18 - 6 = 12
P = 12
e)
2x = -6 /:2
x = -3
L = 10
P = 4 - 2 *(-3) = 4 + 6 = 10
2x =7-3
2x =4/:2
x =2
4+3=7
4-3x=-5
3x =-5-4
3x =-9/-3
-x =3
4-9=-5
4x-x =-7-5
3x =-12/-3
-x =4
3x-6=12
3x =12+6
3x =18/:3
x =6
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a)
2x + 3 = 7
2x = 4 /:2
x = 2
Spr.
L = 2*2 + 3 = 7
P = 7
b)
4 - 3x =-5
-3x = -9 /:(-3)
x = 3
Spr.
L = 4 - 3 *3 = 4 - 9 = -5
P = - 5
c)
4x + 5 - x = -7
3x = -12 /:3
x = -4
Spr .
L = 4(-4) + 5 - (-4) = -16 + 5 + 4 = -7
P = -7
d)
3x - 6 =12
3x = 18 /:3
x = 6
Spr.
L= 3*6 - 6 = 18 - 6 = 12
P = 12
e)
10 = 4 -2x
2x = -6 /:2
x = -3
Spr.
L = 10
P = 4 - 2 *(-3) = 4 + 6 = 10
2x + 3 = 7
2x =7-3
2x =4/:2
x =2
4+3=7
4-3x=-5
3x =-5-4
3x =-9/-3
-x =3
4-9=-5
4x + 5 - x = -7
4x-x =-7-5
3x =-12/-3
-x =4
3x-6=12
3x =12+6
3x =18/:3
x =6