exam Maths Puzzle Numerical Ability

justify each step of the solution:
3(x-4)+10=7
3x-12+10=7
3x-2=7
3x-2+2=7+2
3x=9
3x/3=9/3
x=3
thanks and i hope you can help

Read Solution (Total 0)

exam Other Question

Jane has $10 000 to invest. She invested part of it in a term deposit that pays 4% per year and the rest of her money was invested in bonds paying 5% per year. If Jane earned $440 in interest for one year, how much money did she invest at each rate? Please help me. I need to know how to plugin a problem for Point-Slope equations. Please use this as an example. (3,5), m= -1

Andrew