Pleae tell me the prosses Which expression is equivalent to (8.4x+2.9)+(−3.7x+5)? A
−4.7x+7.9

B
4.7x+7.9

C
−12.1x+7.9

D
12.1x+7.9Which expression is equivalent to (8.4x+2.9)+(−3.7x+5)?

A
−4.7x+7.9

B
4.7x+7.9

C
−12.1x+7.9

D
12.1x+7.9

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1

answer: 193

explanation:

200-7 = 193

step-by-step explanation:

19

step-by-step explanation: