exam Maths Puzzle Numerical Ability

Verify that (-1,3) is a solution to y=(-1/2)x+(5/2)
Could you also please show how you got it.
Thank you

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exam Other Question

can you help me with this problem?
5(x-2)=2x+10
Could someone please help me with these problems?

Solve the following equations. Round to 4 decimal places when necessary.

a. Log3 x=8

b. 27^2x+2=81^x-3

c. log2 (3x+2)=