please solve the problem 9- c, d
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c) 2.5x -7 =0.5 + 13
2.5x - 0.5x = 13+7
2x = 20
x = 20/2=10
x =10
d) 1.5x +2.5 =1.5x +0.3x +1
1.5x -1.5x +0.3x = 1 -2.5
0.3x = -1.5
x = -1.5÷0.3
x = -5
2.5x - 0.5x = 13+7
2x = 20
x = 20/2=10
x =10
d) 1.5x +2.5 =1.5x +0.3x +1
1.5x -1.5x +0.3x = 1 -2.5
0.3x = -1.5
x = -1.5÷0.3
x = -5
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