Solve the simultaneous equation using elimination method x + 4 = 6 and x- 2y=18

Step-by-step explanation:

Write x + 4 = 6 and x- 2y=18 vertically:

x + 4 = 6

x - 2y =18

Multiply the 2nd row by -1, obtaining:

x + 4 = 6

-x + 2y = -18

(2, -8)

Combine the two equations:

x + 4 = 6

-x + 2y = -18

       2y + 4 = -12, or 2y = -16, or y = -8.

We can tell immediately from the first equation that x = 2.

Thus, the solution is (2, -8).

Does this satisfy the second equation?

Is (2) - 2(-8) = 18  true?

Is 2 + 16 = 18 true?  YES.

step-by-step explanation:

i dont get

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98