If you mean: 6a+7 = 5a then the value of a is -7
(5a).7 = -23 7(5a) = -23 35a = -23 a = -23/35 a= -0.657 (3 d.p.)
Oh, come on! 6a - 5a = a, 7 - 5 = 2
5a - 1 = a - 7 4a = -6 a = -1.5
5a + 2 = 7 subtract 2 from both sides: 5a = 5 divide both sides by 5: a = 1
If you mean: 6a+7 = 5a then the value of a is -7
2b(5a - 7)(5a + 7)
(5a).7 = -23 7(5a) = -23 35a = -23 a = -23/35 a= -0.657 (3 d.p.)
2a-8+4=45-5a 2a-4=45-5a 2a-4+4=45+4-5a 2a+5a=49-5a+5a 7a=49 / by 7 = A=7
5a+5=6a-7
7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2
Oh, come on! 6a - 5a = a, 7 - 5 = 2
5a - 1 = a - 7 4a = -6 a = -1.5
5a + 2 = 7 subtract 2 from both sides: 5a = 5 divide both sides by 5: a = 1
7
a2-5a-14 = (a-7)(a+2) when factored
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