Question

Ручка и карандаш вместе стоят 120 тг. 3 ручки и 2 карандаша стоят 320тг. сколько стоят одна ручка и олин карандаш ? помогите пж срочно надооо​

Answer 1

Пошаговое объяснение:

там система уравнений.

Answer 2

To solve this problem, we can set up a system of equations based on the given information. Let's denote the cost of one pen as 'x' and the cost of one pencil as 'y'.

From the first statement, we know that the cost of a pen and a pencil together is 120 Tenge. So, we can write the equation:

x + y = 120 -- Equation 1

From the second statement, we know that 3 pens and 2 pencils together cost 320 Tenge. So, we can write the equation:

3x + 2y = 320 -- Equation 2

To solve this system of equations, we can use the method of substitution or elimination. Let's use the method of substitution.

From Equation 1, we can express 'x' in terms of 'y' as:

x = 120 - y

Now, substitute this value of 'x' in Equation 2:

3(120 - y) + 2y = 320

Simplifying the equation:

360 - 3y + 2y = 320

Combining like terms:

-y = 320 - 360

-y = -40

Dividing both sides by -1:

y = 40

Now, substitute the value of 'y' back into Equation 1 to find the value of 'x':

x + 40 = 120

x = 120 - 40

x = 80

Therefore, one pen costs 80 Tenge and one pencil costs 40 Tenge.

Please note that the above solution is based on the given information and the equations derived from it.