A) 3x+4x = 19 -5
7x = 14
X = 2
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1/3x - 1 = 1/4(x+4/5)
1/3x - 1 = 1/4x + 1/5
20x-60=15x+12
20x-15x=12+60
5x= 72
X= 72/5
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3x+2/4 - 2x-1/3 = 2
3(3x+2)-4(2x-1)=24
9x+6-8x+4=24
X+10= 24
X=24-10
X= 14
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b) x+3-6x=23
-5x+3=23
-5x=23-3
-5x=20
X=-4