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4x+9+x=24
4x+x=24-9
4x=15
x=15:4
x=3,75
g) 9+7x-3-4x=27
7x-4x=27-9+3
3x=21
x=21:3
x=7
h) 8x-7+x=5x+21
8x+x-5x=21+2
2x=23
x=23:2
x=11,5