oblicz : a) 4x=5x-20 b) 4x+15=2(x-6)
a) 4x=5x-20
4x-5x=(-20)
-1x=(-20) |:(-1)
x=20
b) 4x+15=2(x-6)
4x+15=2x-12
4x-2x=-15-12
2x= -27 :2
x= -13,5
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a) 4x=5x-20
4x-5x=(-20)
-1x=(-20) |:(-1)
x=20
b) 4x+15=2(x-6)
4x+15=2x-12
4x-2x=-15-12
2x= -27 :2
x= -13,5