Write the equation of the cost p stands for the cost per pear, a stands for the cost per apple 6p + 3a = 3.9 2p + 5a = 3.3
Solve the equation system To solve the equation system, we work on eliminating variable p so we will find the number of a. To eliminate, we have to change the coefficient of p to the same number (i will change it to coefficient 6) 6p + 3a = 3.9 (multiply 1) 2p + 5a = 3.3 (multiply 3) --------------------------------- 6p + 3a = 3.9 6p + 15a = 9.9 -------------------- - (substract) -12a = -6 a = -6/-12 a = 0.5
To find the cost per pear, subtitute the number of a to one of the equation 2p + 5a = 3.3 2p + 5(0.5) = 3.3 2p + 2.5 = 3.3 2p = 3.3 - 2.5 2p = 0.8 p = 0.4
