a)3x-11=7x+3 to -7/2
b)6x+31=-3x+4 to -3
c)-4x+11=9x+2 to 9/13
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3x-11=7x+3
3x-7x=11+3
-4x=14
x=-14/4=-3,5
3*(-3,5)-11=7*(-3,5)+3-10,5-11=-24,5+3-21,5=-21,5
6x+31=-3x+4
6x+3x=-31+4
9x=-27
x=-3
spr.6*(-3)+31=-3*(-3)+4
-18+31=9+4
13=13
)-4x+11=9x+2
-4x-9x=-11+2
-13x=-9
x=9/13
spr.-4*9/13+11=9*9/13+2
--36/13+11=81/13+26/13
-36/13+143/13=107/13
107/13=107/13
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3x-11=7x+3
3x-7x=11+3
-4x=14
x=-14/4=-3,5
3*(-3,5)-11=7*(-3,5)+3
-10,5-11=-24,5+3
-21,5=-21,5
6x+31=-3x+4
6x+3x=-31+4
9x=-27
x=-3
spr.6*(-3)+31=-3*(-3)+4
-18+31=9+4
13=13
)-4x+11=9x+2
-4x-9x=-11+2
-13x=-9
x=9/13
spr.-4*9/13+11=9*9/13+2
--36/13+11=81/13+26/13
-36/13+143/13=107/13
107/13=107/13