{y=2x+1 4x+y=13 i {3x=12 x-y=1 i {5y=2 x+y=2 i dwie piate( 2,5) prosze pomozcie jak najszybciej:)

y=2x+1 4x+y=13 y=2x+1 4x+(2x+1)=13 y=2x+1 4x+2x+1=13 y=2x+1 6x+1=13 y=2x+1 6x=12/:6 y=2x+1 x=2 y=2*2+1 x=2 y=4+1 x=2 y=5 x=2 ========================================== 3x=12 x-y=1 3x=12 x=1+y 3(1+y)=12 3x=12/:3 3+3y=12 x=4 3y=12-3 x=4 3y=9/:3 x=4 y=3 x=4 ============================================a w tym ostatnim chyba jest coś poylone bo nie dam rady go zrobić.. ale i tak mam nadzieje ze pomogłam ;)

a){y=2x+1 4x+y=13 {y=2x+1 4x+2x+1=13 {y=2x+1 6x=13-1 {y=2x+1 6x=12 /:6 {y=2x+1 x=2 {y=2*2+1 x=2 {y=5 x-2 b){x=12 x-y=1 {x=12 12-y=1 {x=12 -y=1-12 {x=12 -y=-11 {x=12 y=11 c){5y=2 x+y=2 i dwie piate {5y=2 /:5 x+y=2 2/5 {y=2/5 x=12/5-y {y=2/5 x=12/5 - 2/5 {y=2/5 x=10/5 {y=2/5 x=2

a) y=2x+1 4x+y=13 4x+2x+1=13 6x=12 x=2 y=2*2+1 y=5 b) 3x=12|:3 x-y=1 x=4 4-y=1 -y=1-4 -y=-3 y=3 c) 5y=2|:5 x+y=2⅖ y=0,4 x+0,4=2,4 x=2,4-0,4 x=2