linear
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X = -31/8 = -3.875
A linear equation is defined as an equation that contains only the first power of the unknown quantity. For example, 5x - 3 = 7 where "x" is the unknown quantity is a linear equation. If an equation contains an unknown quantity having a higher power than 1, then the equation ceases to be a linear equation. For example, 3x2 + 5x + 7 = 0 is a non linear equation known as a quadratic equation, because the unknown quantity "x" has a power of 2. Similarly, equations containing unknowns with higher powers such as x3, x7, x12 are all non linear equations.
1+8x7=57 but (1+8)x7=63. I'm not sure what you're looking for.
2+2 =4
7 x 7 = 49 6 x 7 = 42 49 - 42 + 2 = 9