Solve for x
x=7
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-1=-\frac{8}{7}\times 7+x
Fraction \frac{-8}{7} can be rewritten as -\frac{8}{7} by extracting the negative sign.
-1=-8+x
Cancel out 7 and 7.
-8+x=-1
Swap sides so that all variable terms are on the left hand side.
x=-1+8
Add 8 to both sides.
x=7
Add -1 and 8 to get 7.
Examples
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Linear equation
y = 3x + 4
Arithmetic
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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