The work of a student to solve a set of equations is shown below:
Equation 1: x + 2y = 10
Equ...
Mathematics, 22.01.2021 07:50 ezellcarly
The work of a student to solve a set of equations is shown below:
Equation 1: x + 2y = 10
Equation 2: 2x + 5y = 15
Step 1: -2(x + 2y) = -2(10)
2x + 5y = 15
Step 2:
- 2x - 4y = -10
2x + 5y = 15
Step 3:
1y = 5
Step 4:
x + 2(1) = 10
Step 5:
X = 8
In which step did the student first make an error?
Answers: 3
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