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5x + 3 = x + 19 | -x
4x + 3 = 19 | -3
4x = 16 |:4
x = 16
b)
2 + 3m = 5 - 5m |+5m
2 + 8m = 5 |-2
8m = 3
5x-x=19-3
4x=16
x=4
2 + 3m = 5 - 5m
3m+5m=5-2
7m=3
m=3/7
5x+3=x+19
5x-x=19-3
4x=16 / : 4
x=4
b)
2+3m=5-5m
3m+5m= 5-3
8m= 2 / : na 8
m=0,25