Proszę o rozwiązanie zadań na z załączników
1.
a) x +3 = 7
-3 -3
x = 4
b) 2x = x +4
- x -x
c) 3x +1 = 2x +3
-2x -2x
x + 1 = 3
-1 -1
x = 2
d) 2x +2 = x +5
-x -x
x +2 = 5
- 2 -2
x = 3
2.
a) x + 17 = 30
-17 -17
x = 13
Spr. za x podstawiamy 13
L = 13 + 17 = 30
P = 30
L = P
b) y - 45 = 54
+ 45 +45
y = 99
c) 2z = z -6
-z -z
z = -6
3.
a) 3t - 11 = 2t +2
-2t -2t
t - 11 = 2
+11 +11
t = 13
spr.
L = 3*13 -11 = 39 -11 = 28
P = 2 *13 +2 = 26 +2 = 28
b) -2u +5 = 9 -3u
+3u +3u
u + 5 = 9
-5 -5
u = 4
L = -2*4 +5 = -8 +5 = -3
P = 9 - 3*4 = 9 -12 = -3
c) 5v -3 = 4v +2
-4v -4v
v -3 = 2
+3 +3
v = 5
L = 5 *5 -3 = 25 -3 = 22
P = 4 *5+2 = 20 +2= 22
4.
a) -5 +x = 10 /+5
x = 15
x - 34 = -35 /+34
x = -1
4x = 3x -5 /-3x
x = -5
b) 64 +2x = 44 +x /-x
64 + x = 44 /-64
x = - 20
3 - x = -2x / +2x
3 +x = 0 /-3
x = -3
4 + 3x = 2 +2x /-2x
4 + x = 2 /-4
x = -2
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1.
a) x +3 = 7
-3 -3
x = 4
b) 2x = x +4
- x -x
x = 4
c) 3x +1 = 2x +3
-2x -2x
x + 1 = 3
-1 -1
x = 2
d) 2x +2 = x +5
-x -x
x +2 = 5
- 2 -2
x = 3
2.
a) x + 17 = 30
-17 -17
x = 13
Spr. za x podstawiamy 13
L = 13 + 17 = 30
P = 30
L = P
b) y - 45 = 54
+ 45 +45
y = 99
c) 2z = z -6
-z -z
z = -6
3.
a) 3t - 11 = 2t +2
-2t -2t
t - 11 = 2
+11 +11
t = 13
spr.
L = 3*13 -11 = 39 -11 = 28
P = 2 *13 +2 = 26 +2 = 28
L = P
b) -2u +5 = 9 -3u
+3u +3u
u + 5 = 9
-5 -5
u = 4
spr.
L = -2*4 +5 = -8 +5 = -3
P = 9 - 3*4 = 9 -12 = -3
L = P
c) 5v -3 = 4v +2
-4v -4v
v -3 = 2
+3 +3
v = 5
spr.
L = 5 *5 -3 = 25 -3 = 22
P = 4 *5+2 = 20 +2= 22
L = P
4.
a) -5 +x = 10 /+5
x = 15
x - 34 = -35 /+34
x = -1
4x = 3x -5 /-3x
x = -5
b) 64 +2x = 44 +x /-x
64 + x = 44 /-64
x = - 20
3 - x = -2x / +2x
3 +x = 0 /-3
x = -3
4 + 3x = 2 +2x /-2x
4 + x = 2 /-4
x = -2