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28-4x-10+6x=8
2x=8-18
2x=-10 |:2
x=-5
Spr
L=4(7 - x) - 2(5 - 3x) = 4(7+5)-2(5+15)=4*12-2*20=48-40=8=P
28-4x-10+6x=8
-4x+6x=8-28+10
2x=-10
x=-5
4(7 - (-5)) - 2(5 - 3(-5)) = 8
4(7+5)-2(5+15)=8
28+20-10-30=8
8=8