Solve: a) 5t + 17 = 2 b) x^3 - 25 = 103 - x^3
a) Solving for t:
We isolate our unknown t on one side, to leave the factors of t on one side and the numbers on the other:
-1st step: substract 17 from both sides --> 5t = -15
-2nd step: divide by 5 on both sides --> t = -3
b) Solving for x: We now isolate the power of x on one side:
-1st step: add x^3 on both sides --> 2*(x^3)-25=103
-2nd step: add 25 on both sides --> 2*(x^3) = 128
-3rd step: divide by two on both sides --> x^3 = 64
- Finally to get rid of the exponent, we take the cube root on both sides of the expression --> x = 4
LC
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Solve x^3 - 25 = 103 - x^3
Factorise and solve x2 - 8x + 15 = 0