Mathematics, 31.01.2020 11:05 gloriuos355
if you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.
βx + 5y = 1
2x + 4y = β4
answers
1. 2(5y β 1) + 4y = β4
2. 2(β5y + 1) + 4y = β4
3. 2x + 4(β5y + 1) = β4
4. 2x + 4(5y β 1) = β4
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