Question

1)12×(4+у)-5у, при у=2. 2)9у+2×(6у+5) , при у= 7

Answer 1

1) 12х(4+2)-5х2
12х6-10=72-10=62
2)9х7+2х(6х7+5)
63+2х47=63+94=157

Answer 2

To calculate the given expressions, simply substitute the value of 'у' into each expression and then perform the arithmetic operations. Let's solve them step by step:

1. 12×(4+у)-5у, при у=2

Replace 'у' with 2: 12 × (4 + 2) - 5 × 2

Perform the operations inside the parentheses first: 12 × 6 - 5 × 2

Now, perform the remaining multiplication and subtraction: 72 - 10

The result is: 62

2. 9у + 2 × (6у + 5), при у=7

Replace 'у' with 7: 9 × 7 + 2 × (6 × 7 + 5)

Perform the operations inside the parentheses first: 9 × 7 + 2 × (42 + 5)

Now, perform the multiplication and addition inside the parentheses: 9 × 7 + 2 × 47

Now, perform the remaining multiplication and addition: 63 + 94

The result is: 157