exam Maths Puzzle Numerical Ability

Could someone help me with this problem please:solving for x 7x=3
This an example of one I did: 3X=81
3X (3)^4
X=4 Thank you in advance Elle J

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exam Other Question

57,855.59 is the 2% of WHAT number?

please show how to solve this problem THIS PROBLEM I HAVE TO PUT IT IN THE STANDARD FORM FOR SLOPE (Ax+By=C). AND THE QUESTION IS WRITTEN

WRITE THE EQUATION THROUGH M=2 AND PASSING THROUGH (-1,-1)

THANKS FOR TAKING YOUR TIME TO READ IT