Amedium-sized apple has 70 calories. this is 10 calories less than 1/4 of the calories in an old westie chocolate bat. we need to find out how many calories are in the chocolate bar

A medium-sized apple has 70 calories. this is 10 calories less than 1/4 of the calories in an old westie chocolate bar. The calorie of the chocolate bar can be solve by establishing one variable equation. let x be the calorie of choco bar:

70 = (x/4 ) – 10

X = 320 calories

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation: