Rozwiąż 3 łatwe równania :* klasa 6 1. 27x + 3+ x = 30 2. 280-y = 120 - 3y3. 8x + 2x - 30 = - 230 daje jan: D
1. 27x + 3+ x = 30 /-30
27x+x-30+3=0
28x-27=0 /+27
28x=27 /:28
x=27/28
2. 280-y = 120 - 3y /-120-3y
3y-y-120+280=0
2y+160=0 /-160
2y= -160 /:2
y= -160/2
y= -80
3. 8x + 2x - 30 = - 230 /+230
8x+2x-30+230=0
10x+200=0 /-200
10x= -200 /:10
x= -20
1. 27x + 3+ x = 30
28x +3=30
28x=30-3
28x=27/:28
x=0,96
2. 280-y = 120 - 3y
2y=120-280
2y=-160/:2
y=-80
3. 8x + 2x - 30 = - 230
10x-30=-230
10x=-230+30
10x=-200/:10
x=-20
Mam nadzieę,że pomogłąm i liczę na naj:)Pozdrawiam:****
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1. 27x + 3+ x = 30 /-30
27x+x-30+3=0
28x-27=0 /+27
28x=27 /:28
x=27/28
2. 280-y = 120 - 3y /-120-3y
3y-y-120+280=0
2y+160=0 /-160
2y= -160 /:2
y= -160/2
y= -80
3. 8x + 2x - 30 = - 230 /+230
8x+2x-30+230=0
10x+200=0 /-200
10x= -200 /:10
x= -20
1. 27x + 3+ x = 30
28x +3=30
28x=30-3
28x=27/:28
x=0,96
2. 280-y = 120 - 3y
2y=120-280
2y=-160/:2
y=-80
3. 8x + 2x - 30 = - 230
10x-30=-230
10x=-230+30
10x=-200/:10
x=-20
Mam nadzieę,że pomogłąm i liczę na naj:)Pozdrawiam:****