Question 360123
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Hi,
find the nth term in each of the linear sequences.
{{{a[n] = a[1] + (n-1)d}}}
3,5,7,9,11,........{{{a[n] = 3 + (n-1)2}}}
8,12,16,20,........{{{a[n] = 8 + (n-1)4}}}
3,7,11,15,19,......{{{a[n] =  3 + (n-1)4}}}

draw graphs for the following pairs of equations on the same grid and hence solve the simultaneous equations. 
y=4x-18
y=-6x+12 
Looks like it is (3,-6) substitution verifies that
{{{graph( 300, 300,-15,15,-15,15,4x-18,-6x+12) }}}