7/5 = 1.4
7 over 5 is equal to 1.4
7/5=1.4
(1) 4a-5b=7 (2) 4a+5b=17 (1)-(2) gives 4a-5b-(4a+5b)=7-17 then -10b=-10 so b=1 from (2) one gets 4a=17-5b=17-5x1=12 so a=3 (3,1) is the solution
5b plus 5-3b-7 is 2b-2.
5b + 5b = 2 x 5b
5b + 3 = 10 - 3 - 3 5b = 7 5b/5 7/5 b= 1.5 There you go !
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
-3-5b/7 = -4 Multiply all terms by 7: -21-5b = -28 Add 21 to both sides: -5b = -7 Divide both sides by -5 remembering that a -/- becomes a + Solution: y = 7/5 = 1.4
The answer is 7.
4(5b - 6a^2)(5b + 6a^2)
7
No. 7b - 2b = 5b
Add the equations: 4a + 4a - 5b + 5b = 7 + 17 ie 8a = 24 a = 3, so b = 1
2