A builder has some red and grey bricks. The red bricks weigh 9 kilograms each, and the grey bricks weigh 8 kilograms each. If the

Question

A builder has some red and grey bricks. The red bricks weigh 9 kilograms each, and the grey bricks weigh 8 kilograms each. If the total weight of all 14 bricks is 120 kilograms, how many of each type of brick does Nellie have?

Bo · Answer

The number of  red bricks  is 6, and there are 8gray bricks.    What is the total number of red and grey bricks?   To evaluate an  algebraic expression , find the expression's value when the variable is replaced by a given number. To evaluate an expression, we substitute the given number for the expression's variable and then simplify the expression using the order of operations.   Here given,  A red brick weighs 9 kg and a gray brick weighs 8 kg. The total number of bricks is 14, with a weight of 120kg.  Let x be a red brick and y be a gray brick.  x + y = 14bricks,   => x = 14 - y bricks  9x + 8y = 120kg  9(14 - y) + 8y = 120  126 - 9y + 8y = 120  -y = -6  y = 6  14 - 6 = 8  The number of red bricks is 6, and the number of  gray bricks  is 8.    To learn more about  expressions  refer to :   https://brainly.com/question/25968875   #SPJ1

What is the total number of red and grey bricks?

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