Question

А) 13х - 2х = 121; б) 5у + 30у = 17640

Answer 1

$13x - 2x = 121 \\ 11x = 121 \\ x = 121 \div 11 \\ x = 11$
$5y + 3y = 17640 \\ 35y = 17640 \\ y = 17640 \div 35 \\ y = 504$

Answer 2

А) 11х=121
х=11
б)35у=17640
у=504

Answer 3

Let's solve the two equations step by step:

А) 13х - 2х = 121

Step 1: Combine the x terms on the left side of the equation: (13x - 2x) = 11x

Step 2: Rewrite the equation with the combined x term: 11x = 121

Step 3: Isolate x by dividing both sides by 11: x = 121 / 11 x = 11

So the value of x is 11.

б) 5у + 30у = 17640

Step 1: Combine the y terms on the left side of the equation: (5у + 30у) = 35у

Step 2: Rewrite the equation with the combined y term: 35у = 17640

Step 3: Isolate y by dividing both sides by 35: у = 17640 / 35 у = 504

So the value of y is 504.

Therefore, the solutions to the given equations are: А) x = 11 б) у = 504