What ordered pairs are a solution to the equations

3x-5y=4
-5x+4y=2

(-7,0)
(6,8)
(3,1)
(-2,-2)

x=-2, y=-2. (-2, -2)

Step-by-step explanation:

3x-5y=4

-5x+4y=2

5(3x-5y)=5(4)

3(-5x+4y)=3(2)

15x-25y=20

-15x+12y=6

-13y=26

y=26/-13

y=-2

3x-5(-2)=4

3x+10=4

3x=4-10

3x=-6

x=-6/3

x=-2

x=-2, y=-2.

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116