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7(7+2l/7)=3(9l-1/3)
We move all terms to the left:
7(7+2l/7)-(3(9l-1/3))=0
We add all the numbers together, and all the variables
7(2l/7+7)-(3(+9l-1/3))=0
We multiply parentheses
14l-(3(+9l-1/3))+49=0
We multiply all the terms by the denominator
14l*3))-(3(+9l-1+49*3))=0
We add all the numbers together, and all the variables
14l*3))-(3(9l+146))=0
We add all the numbers together, and all the variables
14l*3))-(3(9l=0
Wy multiply elements
42l^2=0
a = 42; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·42·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$l=\frac{-b}{2a}=\frac{0}{84}=0$
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