A system of equations is given below:

y = 4x − 3
2x + 7y = 41

Which of the following steps could be used to solve by substitution?

2(y = 4x − 3) + 7y = 41
4x − 3 = 2x + 7y
2x + 7(4x − 3) = 41
2(y = 4x − 3)

Question

A system of equations is given below: 

y = 4x − 3 
2x + 7y = 41 

Which of the following steps could be used to solve by substitution?

 2(y = 4x − 3) + 7y = 41
 4x − 3 = 2x + 7y
 2x + 7(4x − 3) = 41
 2(y = 4x − 3)

anonymous · Answer

@Michele_Laino  @nincompoop  please help

anonymous · Answer

can you guys help?

z4k4r1y4 · Answer

The third option. If you look you'll notice it puts  the first equation in to the second one; which is subtiution.

anonymous · Answer

can you help on another one

anonymous · Answer

A set of equations is given below: 

Equation R: y = 5x + 10 
Equation S: y = 5x + 5 

Which of the following options is true about the solution to the given set of equations?

 One solution
 Two solutions
 Infinite solutions
 No solution

z4k4r1y4 · Answer

Use substitution to solve. No solution.

anonymous · Answer

Solve the system of equations and choose the correct answer from the list of options. 

2x + y = −4 
y = 3x + 2

 negative 6 over five comma negative 8 over 5
 negative 8 over 5 comma negative 6 over 5
 negative 5 over 6 comma negative 11 over 5
 negative 11 over 5 comma negative 6 over 5