Someone help me how to do it? Write an algebraic equation for each problem and then solve the equation.

13. Twice a number increased by 7 is equal to 4 times the same number decreased by 11.

14. Six times the sum of a number and 3 is 13 more than the number.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.