Rozwiąż rownania :
1.6y-5+4y-19=25
2.7a-2-3a+6=4
3. 9x(6-2)+21=3 x - mnożenie
4.2x-7+5x-14=35 x - niewiadoma
1. 6y-5+4y-19=25 |+ (5+19)
10y=49 | : 10
y=4,9
2.7a-2-3a+6=4 |+2
4a+6=6 |-6
4a=0 |:4
a=0
3.9x(6-2)+21=3
36x-18x+21=3|-21
18x=-18|:18
x=1
4.2x-7+5x-14=35 |+ (7+14)
7x=56 | "7
x=8
6y-5+4y-19=25
10y-24=25 I+24
10y=49 I:10
7a-2-3a+6=4
4a+4=4 I-4
4a =0 I :4
9x(6-2)+21=3
9x*4+21=3
36x+21=3 I-21
36x= -18I:36
x= -0,5
2x-7+5x-14=35
7x-21=35 I +21
7x=56 I:7
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1. 6y-5+4y-19=25 |+ (5+19)
10y=49 | : 10
y=4,9
2.7a-2-3a+6=4 |+2
4a+6=6 |-6
4a=0 |:4
a=0
3.9x(6-2)+21=3
36x-18x+21=3|-21
18x=-18|:18
x=1
4.2x-7+5x-14=35 |+ (7+14)
7x=56 | "7
x=8
6y-5+4y-19=25
10y-24=25 I+24
10y=49 I:10
y=4,9
7a-2-3a+6=4
4a+4=4 I-4
4a =0 I :4
a=0
9x(6-2)+21=3
9x*4+21=3
36x+21=3 I-21
36x= -18I:36
x= -0,5
2x-7+5x-14=35
7x-21=35 I +21
7x=56 I:7
x=8