X-9=0.6X+9 1

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X-9=0.6X+91X-9=0.6X+91X-9=0.6X+91X-9=0.6X+90.4X=18X=45x-0.6x=9+90.4x=18x=45

X-9=0.6X+9 1
X-9=0.6X+9 1

X-9=0.6X+9 1
X-9=0.6X+9
0.4X=18
X=45

x-0.6x=9+9
0.4x=18
x=45