Question

W załczniku wszystki jest prosze szybko !!!!

Answer 1

1 . a) 2t + 4 = t - 3 | -4
2t= t-7
b) 1 - 3t = 3 - 4t | +4t
1+t = 3
c) x = 1/5x - 3 | - 1/5x
4/5x = -3
d) 1/4y = 3 + y | -y
-3/4y= 3
f) 3(x - 8) = 6x - 9 | :3
x-8 = 2x-3
g) x - 1/3y = 1/6 - 2x | *6
6x-2y =1-12x

 

2 . a) 5x - 1 = ½(3x-8) | razy 2
10x - 2 = 3x - 8 | - 3x
7x- 2 = -8 | + 2
7x = -6 | : 7
x = - 6/7

b) 4(½ x -3 ) = 8+ 12x | :4
½ x - 3 = 2+ 3x | - 3x
- 2½ x - 3 = 2 | + 3
- 5/2 x = 5 | : (- 5/2)
x = -2

 

 

3. x=3 | *2
....2x....=..6..... | +3
.....2x+.3.=.9....... | - 5x
...-3x+3....=.9-5x....... | + 1
....-3x+4...=...10-5x..... | *2
....-6x+8...=...20-10x.....
b)
x = -1 | +4x
.5x.....=.-1+4x..... | -3
.5x-3.....= -4+4x..... | +2
..5x-1....=..-2+4x.... | *(-1)
..-5x+1....=...2-4x.... | +4
...-5x+5...=..6-4x.....

 

 

 

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