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Sagot :
To solve the equation [tex]\( x + y = 8 \)[/tex] for [tex]\( y \)[/tex] given that [tex]\( x = -1 \)[/tex], follow these steps:
1. Substitute [tex]\( x = -1 \)[/tex] into the equation [tex]\( x + y = 8 \)[/tex]:
[tex]\[ -1 + y = 8 \][/tex]
2. To isolate [tex]\( y \)[/tex], add 1 to both sides of the equation:
[tex]\[ -1 + y + 1 = 8 + 1 \][/tex]
3. Simplify the left side of the equation:
[tex]\[ y = 8 + 1 \][/tex]
4. Perform the addition on the right side:
[tex]\[ y = 9 \][/tex]
Therefore, the value of [tex]\( y \)[/tex] is [tex]\( 9 \)[/tex].
1. Substitute [tex]\( x = -1 \)[/tex] into the equation [tex]\( x + y = 8 \)[/tex]:
[tex]\[ -1 + y = 8 \][/tex]
2. To isolate [tex]\( y \)[/tex], add 1 to both sides of the equation:
[tex]\[ -1 + y + 1 = 8 + 1 \][/tex]
3. Simplify the left side of the equation:
[tex]\[ y = 8 + 1 \][/tex]
4. Perform the addition on the right side:
[tex]\[ y = 9 \][/tex]
Therefore, the value of [tex]\( y \)[/tex] is [tex]\( 9 \)[/tex].
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