If YX=YZ, X is 9x-23 and Z is 4x+9 find Z?

Easy points boii. read it. ya. fresh

There is a linear relationship between a salesperson sales and her weekly income.if her sales are $200 her income is $500 and if her sales are 1,200 her income is $600.what is the relationship between sales and income

Pierre is covered by his employers group major medical plan. his employer pays for 75% of the premium and he pays for 25%. how much would a $10000 benefit be taxable as income under this plan