1 Answer

Jamesdlin · Answer 1 · 2022-09-29T09:58:57+0000

$\huge{ \mathfrak{ \underline{ Answer \: \: ✓ }}}$

The equations are :

-3x + 4y = 7. - [1]

2x + y = -1 - [2]

$\underline{ \underline{ \bf{step} - 1}}$

multiply equation [2] with 4

$\longrightarrow(2x + y = -1 ) * 4$

$\longrightarrow8x + 4y = - 4$

$\underline{ \underline{ \bf{step} -2}}$

subtract equation [1] from [2]

$\longrightarrow8x + 4y - ( - 3x + 4y) = - 4 - 7$

$\longrightarrow8x + 4y + 3x - 4y = - 11$

$\longrightarrow11x = - 11$

$\longrightarrow \: x = - 1$

$\underline{ \underline{ \bf{step} - 3}}$

plugging the value of x in equation [1]

$\longrightarrow- 3x + 4y = 7$

$\longrightarrow - (3 * - 1) + 4y = 7$

$\longrightarrow3 + 4y = 7$

$\longrightarrow4y = 4$

$\longrightarrow \: y = 1$

$\#TeeNForeveR$

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