Question

Решите пж1)-3 1/2y * 4x2)5*(1,8x+1,2)-12РЕШИТЕ​

Answer 1

Ответ:

1) -3 1/2y * 4x =

$-3\frac{1}{2}y*4x=-\frac{3*2+1}{2} y*4x=-\frac{7}{2} y*4x=-7y*2x=-14xy.$

2) 5 * (1,8x + 1,2) - 12 = 5 * 1,8x + 5 * 1,2 - 12 = 9x + 6 - 12 = 9x - 6.

Answer 2

1) To solve the equation -3 + 1/2y + 4x = 0, we need to isolate the variable y. Here's how we can do it step by step:

Step 1: Move the constant term (-3) to the other side of the equation: -3 + 1/2y + 4x = 0 1/2y + 4x = 3

Step 2: Subtract 4x from both sides of the equation to isolate the term with y: 1/2y = -4x + 3

Step 3: Multiply both sides of the equation by 2 to eliminate the fraction: 2 * (1/2y) = 2 * (-4x + 3) y = -8x + 6

Therefore, the solution to the equation -3 + 1/2y + 4x = 0 is y = -8x + 6.

2) To solve the expression 5 * (1.8x + 1.2) - 12, we can follow these steps:

Step 1: Distribute the multiplication to both terms inside the parentheses: 5 * 1.8x + 5 * 1.2 - 12

Step 2: Multiply the coefficients: 9x + 6 - 12

Step 3: Combine like terms: 9x - 6

Therefore, the solution to the expression 5 * (1.8x + 1.2) - 12 is 9x - 6.

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