Solve using cross-multiplication : 0.4x - 1.5y = 6.5 0.3x + 0.2y = 0.9

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KnowledgeBoat · Accepted Answer

Simplifying first equation, we get : ⇒ 0.4x - 1.5y = 6.5 Multiplying both sides of the above equation by 10, we get : ⇒ 10(0.4x - 1.5y) = 10 × 6.5 ⇒ 4x - 15y = 65 ⇒ 4x - 15y - 65 = 0 Simplifying second equation, we get : ⇒ 0.3x + 0.2y = 0.9 ⇒ 10(0.3x + 0.2y) = 0.9 × 10 ⇒ 3x + 2y = 9 ⇒ 3x + 2y - 9 = 0 So, the equations are ⇒ 4x - 15y - 65 = 0 ........(1) ⇒ 3x + 2y - 9 = 0 ........(2) By cross-multiplication method, we get : Hence, x = 5 and y = -3.

Mathematics

Solve using cross-multiplication :
0.4x - 1.5y = 6.5
0.3x + 0.2y = 0.9

Linear Equations

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Mathematics

Solve using cross-multiplication :0.4x - 1.5y = 6.50.3x + 0.2y = 0.9

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Solve using cross-multiplication :
0.4x - 1.5y = 6.5
0.3x + 0.2y = 0.9