7: Answer: [tex](x,y)=(\frac{5}{4},\frac{3}{2} )[/tex]
Substitute the value of Y:
[tex]-2x-3(10x-11)=-7[/tex]
Solve for X:
[tex]-2x-3(10x-11)=-7[/tex]
[tex]x=\frac{5}{4}[/tex]
Substitute the value of X:
[tex]x=\frac{5}{4}[/tex]
[tex]y=10*\frac{5}{4}-11[/tex]
Solve for Y:
[tex]y=10*\frac{5}{4}-11[/tex]
[tex]y=\frac{3}{2}[/tex]
Solution:
[tex](x,y)=(\frac{5}{4},\frac{3}{2} )[/tex]
8: Answer: [tex](x,y)=(3,-2)[/tex]
Substitute the value of Y:
[tex]4x-3*(-2)=18[/tex]
Solve for X:
[tex]4x-3*(-2)=18[/tex]
[tex]x=3[/tex]
Solution:
[tex](x,y)=(3,-2)[/tex]
9: Answer [tex](x,y)=(0,-2)[/tex]
Substitute the value of Y:
[tex]-3x+6(-2+5x)=-12[/tex]
Solve for X:
[tex]-3x+6(-2+5x)=-12[/tex]
[tex]x=0[/tex]
Substitute the value of X:
[tex]x=0[/tex]
[tex]y=-2+5*0[/tex]
Solve for Y:
[tex]y=-2+5*0[/tex]
[tex]y=-2[/tex]
Solution:
[tex](x,y)=(0,-2)[/tex]
10: Answer [tex](x,y)=(-3,-6)[/tex]
Substitute the value of Y:
[tex]-5x-(6+4x)=21[/tex]
Solve for X:
[tex]-5x-(6+4x)=21[/tex]
[tex]x=-3[/tex]
Substitute the value of X:
[tex]x=-3[/tex]
[tex]y=6+4x(-3)[/tex]
Solve for Y:
[tex]y=6+4x(-3)[/tex]
[tex]y=-6[/tex]
Solution:
[tex](x,y)=(-3,-6)[/tex]
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