Thesolutionof the givensystemofequationsusing substitution is x = 9/5 and y = -1.What is the equation?There are manydifferentways to define an equation. The definition of an equation in algebra is amathematical statementthat demonstrates the equality of 2 mathematicalexpressions.More than onevariablemay be present inside alinear equation.As per the givenequations,5x + 2y = 7  and 4x +y =84x +y =8 → 4x = 8 - y⇒ x = 2 - y/4Substitutethis x into the above,5(2 - y/4) + 2y = 710 - 5/4 y + 2y = 710 + y(2 - 5/4) = 73y/4 = -3y = -1And, 5x + 2(-1) = 75x = 9x = 9/5Hence "Thesolutionof the givensystemofequationsusing substitution is x = 9/5 and y = -1".For more about theequation,brainly.com/question/10413253#SPJ1...

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