Question

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A: 5 (M+7) = 5 (M-9)

B: -8 (y+4) = -4+9 (y-7)

C: 4 (X-3) = -3+8 (X-1)

D: -2 (X-4) +8= 8 (-2x-1)+9

E: -7 (M-5)+2M = -(M+5)-7

F: - (2x+7) -6= -3 (x-2) -10

G: X-7+9 (x-8)= -5 (x+6) -2

Answer 1

A: 5 (M+7) = 5 (M-9) ==> 5m+35= 5m-45 ==> 5m-5m=-45-35 ==> 0= -75 Esta igualdade não existe no campo do reais

B: -8 (y+4) = -4+9 (y-7) ==> -8y-32= -4+9y-63 ==> -8y-9y= -63+32 ==> -y= -31 ==> y= 31

C: 4 (X-3) = -3+8 (X-1) ==> 4x-12= -3+8x-8 ==> 4x-8x=-11+12 ==> -4x= 1  ==> x= -1/4 ==> x= -0,25

D: -2 (X-4) +8= 8 (-2x-1)+9 ==> -2x+8+8=-16x-8+9 ==> -2x+16x= -8-16+9 ==> 14x= -15 ==> x= -15/14

E: -7 (M-5)+2M = -(M+5)-7 ==> -7m+35+2m= -m-5-7 ==> -5m+m= -12-35 ==> -4m= -47 ==> m= 47/4

F: - (2x+7) -6= -3 (x-2) -10 ==> -2x-7= -3x+6-10 ==> -2x+3x= -4+7 ==> x= 3

G: X-7+9 (x-8)= -5 (x+6) -2 ==> x-7+9x-72= -5x-30-2 ==> 10x+5x=-32+79 ==> 15x= 47 ==> x= 47/15 ==> x= 3 2/15