Pls help with this algebra ( it’s about equations with variables on both sides) unit practice 1-4).

x = -5

2.1x+45.2 = -7.3-8.4x

10.5x+45.2 = -7.3

10.5x = -52.5

x = -5

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%