Pls help every time i see fractions my brain shuts down

How many solutions does the nonlinear system of equations graphed below have?

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

Will mark the brainliest.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?