exam Maths Puzzle Numerical Ability

Find the smallest whole number that when divided by 5,7,9, and 11, respectively, gives remainders of 1,2,3,and 4.

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I would like some help i do not understand -3x+2y=2. I need to show how to graph it also can you please help me.
Thanks for your time
Zack Brooks
9th grade
Can someone please show me how to write the equation that is the image of y=3^x under the mapping rule (x,y)---(1/2x-1,2y+3) ????