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secondary 2 | Maths
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hi can pls someone explain the substitution method in this qn for me
Date Posted: 2 years ago
Views: 366
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There are many ways to solve this question using subtitution.
Step 1 is to make one of the variables in the equations the subject. So essentially you have 4 choices:
1. Make x the subject in equation 1
2. Make y the subject in equation 1
3. Make x the subject in equation 2
4. Make y the subject in equation 2
Step 2 is to substitute your result for step 1 (equation 3) into the other equation (if you used equation 1 in the first step, sub into equation 2 and vice versa). Here you will get the answer to your first variable.
Step 3 is to substitute your result for step 2 (equation 4) into equation 3. And you will get the answer to your second variable.
Step 1 is to make one of the variables in the equations the subject. So essentially you have 4 choices:
1. Make x the subject in equation 1
2. Make y the subject in equation 1
3. Make x the subject in equation 2
4. Make y the subject in equation 2
Step 2 is to substitute your result for step 1 (equation 3) into the other equation (if you used equation 1 in the first step, sub into equation 2 and vice versa). Here you will get the answer to your first variable.
Step 3 is to substitute your result for step 2 (equation 4) into equation 3. And you will get the answer to your second variable.
Date Posted:
2 years ago
thank you!! its a little bit confusing but ur explanation cleared up some of my problems :))
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