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OpenStudy (anonymous):
How do you solve this question using substitution 2r + s = 11 and 6r - 2s = -2? Please help me and explain along the way
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OpenStudy (campbell_st):
take the 1st equation and make s the subject, then substitute that into the 2nd equation.
OpenStudy (anonymous):
I did n I got a decimal I think I did something wrong
OpenStudy (campbell_st):
well you do have a mistake... you need to take care when distributing -2 (11 - 2r)
OpenStudy (anonymous):
Ok yea so its -22 + 4r?
OpenStudy (campbell_st):
so you have 6r - 22 + 4r = -2 or 10r - 22 = -2
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