Put the bs on the same side of equal sign then put the other numbers on the different side getting 3b=-4 then u divide by 3 to get b=-4/3
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-86
(4, 3)
4a - 5b = 74a +5b = 17From the first equation:4a = 7 + 5bsubstitute this value in the second equation:7 + 5b + 5b = 177 + 10b = 1710b = 10b = 1Now,solve for a :4a - 5(1) = 74a = 7 + 54a = 12a = 3
5b = 21 + 4b 5b - 4b = 21 + 4b - 4b b = 21
b= -162