7-3х=4х-9, 6а-1=3а+7 , 10y-3=5+3y

7-3x=4x-9 -3x-4x=-9-7 -7x=-16 7x=16 x=[latex] \frac{16}{7} [/latex] x=[latex]2 \frac{2}{7} [/latex] 6a-1=3a+7 6a-3a=7+1 3a=8 a=[latex] \frac{8}{3} [/latex] a=[latex]2 \frac{2}{3} [/latex] 10y-3=5+3y 10y-3y=5+3 7y=8 y=[latex] \frac{8}{7} [/latex] y=[latex]1 \frac{1}{7} [/latex]