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a) -3x+5(2x-7)-6(-5x+6 dla x = -1
-3x+10x-35+30x-36 =
-71+37x =-71+37(-1)=-71-37=-108
b) 5(a-2b)+4(3a+6b)+12 dla a=2 i b = -5
5a-10b+12a+24b+12 =
17a+14b+12 =17*2+4(-5)+12=34-20+12=14+12=26
-3x+10x-35+30x-36
37x-71
37*(-1)-71
-37-71
-108
b) 5(a-2b)+4(3a+6b)+12 dla a=2 i b = -5
5a-10b+12a+24b+12
17a+14b+12
17*2+14*(-5)+12
34-70+12
-24
-3x+10x-35+30x-36=
=2x-71=
2*(-1)-71= -2-71= -73
b) 5(a-2b)+4(3a+6b)+12 dla a=2 i b = -5
5a-10b+12a+24b+12=
=17a+14b+12=
=17*2+14*(-5)+12=
=34+(-70)+12=
=-36+12=
=-24