Por Favor quien me podría ayudar con estos dos sencillos ejercicios de ecuaciones de primer grado?
x+8=4
m+9=7
a-5=3
x+8=4
m+9=7
a-5=3
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x + 8 = 4
x = 4 - 8
x = - 4
m + 9 = 7
m = 7 - 9
m = - 2
a - 5 = 3
a = 3 + 5
a = 8